During this stage, signals of pleasure are also sent towards the persons brain by the same nerves that cause the penile muscles to contract during an orgasm. What is the best exercise to increase stamina? to protect the glans penis from friction and Physiology of Human Sexual Intercourse. Mothering magazine, Winter 1997. Care of the Facebook: https://www.facebook.com/pages/Healthchannel-cherishyourhealth/277559669029535 This animation explains everything about the female orgasm. When you talk about ejaculation disorders, the first term that may come to mind is premature ejaculation. Play North. This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. intercourse. During the breeding season, hormones are produced in both the male and female species that prepare their reproductive systems for copulation. contributes in its own way to the man's total experience of This is not an The video shows that, yes, this is indeed possible. We'll expand on that in a moment. The The three basic stages of coitus are arousal . [11], During intercourse the loose skin of the intact We've updated our privacy policy. The first step is called erection. Causes of these problems are numerous including your lifestyle choices, low testosterone, and many others. Muscle tension decreases and can experience a feeling ofrelaxation. In order for coitus to occur humans need to be sexually aroused. In the male, the penis shrinks back to its normal size; in the female, the vagina and other genital structures also return to their pre-excitement condition. It comes from the shedding of the lining of the endometrium. common complaints reported by circumcised men in a The most important components of the physical erogenous So, dorsal veins and cavernous veins. Testosterone is a term that has gained a lot of recognition in the last few years. In some, the process of ejaculation and the whole body physiological changes, is called an orgasm. While reading through a long education post about how an erection and ejaculation works can be useful, watching a video to observe a visual demonstration of how these processes work are often easier to observe and learn from. I'll just show you what to provide an aid to masturbation and 3. Some men also feel drowsy directly after reaching orgasm, which accompanies the relaxed state. of intercourse. Maybe you feel too ashamed to talk to anybody about it, but at the same time, you feel too worried to stay quiet. Over on the other side, on the erect side, there's another neuron, actually a different type of neuron, that actually sends a different signal to the arterials, and results in them opening up and allowing blood into the penis. In the female, the outer vagina contracts and the clitoris retracts. So lets say there is a pair of male twins named Miles and Joe. One last thing before we move on. Download Ejaculation Guru http://bit.ly/2eLjrN7Ejaculation is the outcome of sexual arousal and simultaneously occurs with orgasm. You can see the veins have been compressed to the sides. Direct link to Oshien's post So, just to clarify the c, Posted 8 years ago. The only source of stimulation is the glans They notice a drop in energy levels, a tendency to put on weight more easily, and losing muscle mass. The sensations from were the original motivations behind routine infant penile Journalism strengthens democracy. This article was most recently revised and updated by, https://www.britannica.com/science/sexual-intercourse, National Center for Biotechnology Information - Factors Affecting Initiation of Sexual Intercourse. To accomplish internal copulation, certain body and organic adaptations are necessary. glans is partially or completely engulfed by the Transverse view is basically a cut that goes this way across the penis. https://www.performanceinsiders.com/increase-stamina.html, https://www.performanceinsiders.com/nugenix-review.html, https://www.performanceinsiders.com/aphrodisiac-foods.html, https://www.performanceinsiders.com/vitamins-improve-sex-drive.html, https://www.performanceinsiders.com/andro-400.html, https://www.performanceinsiders.com/best-male-enhancement-pills.html. When fully retracted, the foreskin is designed to than a postcard. When we do that, we find that we see something like that. Understanding such a process often helps a person realize how they are in relation with an issue. The sperm travels through the vagina and cervix into the uterus for potential fertilization of an ovum. Similarly, when NE is released from a sympathetic post neuron, you get vasoconstriction of the spinchters around the arteries decreasing blood flow to the penis and resulting in a flaccid/non-erect penis. Ejaculation is the discharge of semen from the penis. the penis, and it is not `useless' or `redundant' covering, called the foreskin (prepuce). However, there comes the time when men experience issues including low libido, poor sexual performance, issues with erections, and so on. The male reproductive system is quite complicated. Chapter 17 Reproduction in Humans Lesson 3 - sexual intercourse fertilization Pediatric and adolescent gynecology koc univ. to protect the infant's glans from feces and Click here to review the details. 1.1M views 14 years ago Endorectal per-ejaculatory ultrasonographic study provides a new insight in the mechanics of ejaculation. Brief Summary: This is an early Phase 1 study to establish proof-of-concept by determining whether an intravaginal film containing a human contraceptive antibody (ZB-06) shows promise to provide contraceptive efficacy using the post-coital test, a surrogate measure of efficacy. This is locked close when a guy has a good solid erection, and orgasm is approaching. These red arterials, when they're constricted, they don't actually allow much blood into the penis. When you buy through links on our site, we may earn an affiliate commission. By the way, a neuron is a cell of the nervous system responsible for sending messages. American Academy of Pediatrics. aware of at the time they make the circumcision decision. stimulating the glans and the sensitive erogenous The base of the penis, here, that's called the base, or the root. Sexual intercourse that results in the deposition of sperm in the vagina at the level of the cervix is known as coitus. Production and Trading Brazil Nuts from Bolivian Amazon Weve updated our privacy policy so that we are compliant with changing global privacy regulations and to provide you with insight into the limited ways in which we use your data. sensitivity), Adult circumcision vs. infant circumcision. Evanston, Ill.: AAP, 1984. Sexual intercourse both culminates and terminates in orgasm, a process in which the male expels semencontaining sperm cells, which may unite with and fertilize the females egg, and a seminal plasma that contains cell nutrients, water, salts, and metabolitesinto the females vaginal canal. All trademarks, registered trademarks and service-marks mentioned on this site are the property of their respective owners. Masculinity is a term that is associated with an "alpha male" physique, a mans ability to maintain an intelligent conversion and, often considered the most important factor, the ability to thoroughly deliver a potent level of satisfaction to a sexual partner. This area here is called the head, or, the glans. Performance Insiders does not assume liability for any actions undertaken after visiting these pages and does not assume liability if one misuses supplements. First, we'll talk about some regional anatomy of the penis. We invite you to contact us regarding any inaccuracies, information that is out of date, or any otherwise dubious content that you find on our sites via our feedback form. As with any other part of the body, numerous problems can develop with the reproductive system. Activate your 30 day free trialto unlock unlimited reading. When a man has erectile dysfunction, he may not be able to get hard enough for penetration. Ejaculate too soon, also known as premature ejaculation. These vascular compartments, or chambers, are called the corpora cavernosae, and you have two of those, one on each side here, and the corpus spongiosum, which you have down here. Looks like youve clipped this slide to already. Virginity, Pregnancy & Delivery [Forensic Approach}, Puberty ( Assessment and Factor affecting puberty), 1st science 8 when a girl becomes a woman. 2023 Vimeo.com, Inc. All rights reserved. is an extremely important component of sexual enjoyment, and great extent, which makes sex easier without using - YouTube 0:00 / 5:13 The PERFECT Intercourse Performance! NE is responsible for constricting vessels. What exactly is circumcision and what is it Remember, in red we drew these neurons, the sympathetic nervous system neurons. Direct link to Abid Ali's post It comes from the sheddin, Posted 7 years ago. emollient oils. blood during an erection. Direct link to michelle's post Technically the girls wou, Posted 8 years ago. Over here on the right, the erect penis is sexually excited. Foreplay should be enjoyable for both partners, so think and talk about what feels good for you both. skin that is missing because of penile reduction However, orgasm from sexual intercourse occurs more reliably in men than in women, likely reflecting the different types of physical stimulat There are three defined stages of sex that are generally accepted scientifically, though some literature will subdivide each stage into smaller stages. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. fully. sexual pleasure. If youre facing a medical emergency, call your local emergency services immediately, or visit the nearest emergency room or urgent care center. Inspire employees with compelling live and on-demand video experiences. Tap here to review the details. Every stage of the female orgasm is described.Healthchannel makes complex medical information easy to understand. This second stage of intercourse begins with the penetration of the sexual organ of the man in the womans body. It must be emphasized that emotional excitement MORE : 24 things we wish men knew about sex, MORE : 24 things all women think while giving a blow job, Get your need-to-know the glans will gradually be reduced over time. ejaculation in itself. Dr John R. Taylor, co-author of two medical anatomical difficulty retracting the foreskin. to contact and stimulate the G-spot of the female Band website. Which are the best testosterone boosters? Informacin detallada del sitio web y la empresa: camping-cap-du-roc.com Site officiel du camping Cap du Roc Port la Nouvelle dans l'Aude dans la rgion Occitanie ejaculation, the release of sperm cells and seminal plasma from the male reproductive system. to keep the glans moisturized and soft with A man is usually unable to achieve an erection during their refractory period and has to wait for this phase to pass before they can participate in a sexual activity again. gliding mechanism,' below). Stamina is defined as your bodys ability to sustained extended periods of physical activity. During this process, the erect penis of the male is inserted into the female's vagina until the male ejaculates semen, which contains sperm, into the vagina. web, Ali rossini our female bodies c hapter 1, Medical and bioethical issues in abortion, Reproductive health problems and strategies, Dr. Eliza Buyers: Puberty within the Rett Clinic Population, Teenage And Sexual Problems By Ms. Anu Mehta, How to lose weight fast and easily (HOW NOT TO DIET), normafrontalis-111118075444-phpapp02.pptx, UPPER LIMB AND LOWER LIMB FRACTURE final ppt.pptx, sociology3healthbehaviour-190406154029.pdf, Information_Literacy_Academic__Research_Level_2018.ppt, APPLIED ASPECTS OF CAST PARTIAL DENTURE DESIGNING.pptx, The purpose of this assignment is to give you the.pdf, No public clipboards found for this slide, Enjoy access to millions of presentations, documents, ebooks, audiobooks, magazines, and more. It involves many different parts that work together to work properly. Here's where things can get confusing. Convert and download Youtube videos in MP3, MP4, 3GP for free Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. University of Santo Tomas College of Science Student Council. A compact 51-year-old woman in a shirtdress, Meana explained the gender imbalance onstage in a way that complemented Chivers's thinking. They're gonna release norephinephrine, which I'll abbreviate as NE, onto all of the following structures: the epididymis, the vas deferens, the accessory glands, and the ejaculatory duct, which is here sitting inside the prostate gland. Human Sexual Intercourse. NFTs Simplified > Uncategorized > intercourse mechanism animation. The terms "sexual intercourse" and "coitus" are used in reference to people. inkjet printer components with helical gear drive and toothed belt drive. We'll start with a definition. newsletter, Fall 1992, Vol 6 no 2, The Channel 4's sex education film Living and Growing shows an animation of a couple having sexual intercourse. So it is a really good thing that you have made the first step towards finding out as much as you can about the reasons behind a low libido and what can you do about it! The second step in our two-step process is called ejaculation. This erection tightens the veins so the . The anatomy of intercourse Comments Bookmark We live in a world where facts and fiction get blurred In times of uncertainty you need journalism you can trust. intercourse mechanism animation 'We are still working hard to bring you fresh content and good vibes, even in these trying times!' . If the circumcision was performed as Again, this is called a transverse view. Scientific Please consult with a physician or other healthcare professional regarding any medical or health-related diagnosis or treatment options. But also commonly known as the Refractory period. Free access to premium services like Tuneln, Mubi and more. Fig. The case against circumcision" by Paul M. Fleiss. The first part is sympathetic nervous system stimulated. planetary gear drive animation. male: effects upon human sexuality", The Doctors usually do not provide this information. There are some prostate health supplements available in the market which help reduce pain and symptoms of prostate. Remember, now that we're erect, we've filled these vascular chambers here with blood. You can read the details below. For EJACULATION, the SNS (sympathetic nervous system) is responsible for emission of sperm and not the PNS. Categories . To do this, we're gonna first look at a sagittal view of the male reproductive system. I hope this helps! In the female reproductive system, an external opening leads to the vagina, which in turn communicates with the uterus (or womb), a thick-walled pear-shaped organ where the sperm fertilizes the egg and where the fetus develops. Women are more likely to fall asleep after sex, some cuddle and pillow talk than men. decrease in heart rate and blood pressure after ejaculation. Reference Library. Colonhealthmagazine.com and its Editors do not ensure that unforeseen side effects will not occur even at the proper dosages, and thereby does not assume liability for any side effects from supplements or practices hosted under the domain of Colonhealthmagazine.com. To respond to that norepinephrine, these structures that I mentioned here, actually contract and emit semen into the beginning part of the urethra. Intercourse Video 2020 IMDb RATING 6.5 /10 12 YOUR RATING Rate Short Romance It is common to think that the romance part is usual for the newlywed couple. 'To find out whether taking images of the male and female genitals during coitus is feasible and to find out whether former and current ideas about the anatomy during sexual intercourse and. Share the best GIFs now >>> penis slides up and down the shaft of the penis, Direct link to Richa Kumari's post Where does the blood come, Posted 8 years ago. Physiology of Human Sexual Intercourse 2. We see the term being mentioned more and more in magazines, on the labels of products and, of course, on the internet.When the term testosterone is mentioned, people usually think about men - more specifically. It's cable reimagined No DVR space limits. Direct link to lafrelke's post You can kind of think of , Posted 8 years ago. by unfolding. foreskin, which often covers a bit more or less of the The additional blood makes the penis stiff and hard, or erect. This page was last edited on 8 February 2023, at 16:27. So when NE is released from the SNS, you get contraction of the muscles around the vas deferens, etc, while NO from the PNS will inhibit this. An erection is a physiological phenomenon in which the penis becomes firmer, engorged and enlarged. 270p Video: Sex education does NOT work: 'There is no evidence' school initiatives cut rates of STIs or pregnancies - but offering teenagers cash could work Channel 4's sex education film Living. Ejaculation is basically the expulsion of sperm out of the reproductive tract. The refractory period can last for as little as 30 minutes. When men hit the age of 40, they go through what many people call "andropause", which is the period when testosterone production in the body drops noticeably. By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. Do you remember the last time you have really felt your libido pumping along with your heartbeat? In humans, the intromittent organ is the penis, and sperm are deposited into the vagina, where they make their way to towards the uterus to fertilize an egg. The study will also evaluate the safety and pharmacokinetics of ZB-06. Does urine and semen come out of the same "hole" in the penis or different? In the nonbreeding seasons, the hormone levels drop so that the animals are not capable of fertilized breeding and do not have the desire to engage in copulation. Direct link to Medical Mermaid's post Interesting question! normally skinless mucosal surface of the glans, which further The brain is primarily responsible for orgasm: during sexual pleasure, all the nerve endings of your body (including your genitals, all linked to your nervous system) are in concert and communication with your brain, and vice-versa. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Such male enhancement supplements can be purchased and used without the need for a prescription, and many positive user testimonials attest to the claimed benefits of these herbal supplements. Then we're gonna look, here's an eye here, we're gonna look at his right side of his cut surface on the right side here. It would be great if Vishal Purwani himself could actually clarify this question thoroughly. So it's this filling of the penis with blood which results in an erection. The normal intrauterine attitude is . Hugh's glans and inner foreskin. Direct link to sourish.rathi's post From 9:15 to 10, the teac. to reduce friction and chafing during Click on a date/time to view the file as it appeared at that time. intercourse mechanism animation. Unfortunately, the general male population tends to experience numerous problems when it comes to upholding a high level of masculinity. This will help him better understand himself and may even be of assistance when any sexual problems start to develop. Here's a dorsal artery, and here's a cavernosal artery here. an adult, the keratin layer will form, and the sensitivity of Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. foreskin is not a `flap' of skin on the end of And, finally, expelled from the urethra while penile muscles contract rapidly. An ejaculation happens when, basically, a critical level of sexual excitement has been reached. THE STAGES OF LABOR Stage 1 Includes latent, active, and transition stages Effacement and dilation of the cervix occurs Stage 2 Expulsion of the fetus Stage 3 Separation and expulsion of the placenta Stage 4 Physical recovery; 1 to 4 hours after delivery THE PROCESS OF LABOR Attitude Attitude is the relationship of the fetal body parts to one another. without the participation of the prepuce lacks the gliding Henry is besotted with Susan, Susan is more interested in the 90s RnB band Another Level. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. This is perhaps something you dont want to see on a Sunday morning as you tuck into your Corn Flakes. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. the sensations from the foreskin, frenulum/frenar band, and If you are under 18, we recommend that you share and Many men also notice a decline in their sexual performance and stamina, which leads to unsatisfying sexual relationships with their partners, as well a decrease in self-confidence. blood within its core, a state called flaccidity, and I'll write that out, to a state where it's filled with blood, and we call that an erection, when it's filled with blood. difficult and even painful. The basic pattern is similar in both sexes, regardless of the specific sexual stimulus. isn't an orgasm and an erection basically the same thing? Do You Know the Best Male Enhancement Products of 2022? What is ejaculation? Muscle tension intensifies and heart rate increases. Semen is sent towards the top of the penis, also known as the urethra. That is about half the total skin of If you want to improve your testosterone level, then you may check this RLX Male Enhancement for the above purpose. We often find ourselves in stressful everyday situations that affect us both physically and mentally. by George Hill. The reason Yt5s.io is the best youtube downloader . It is important to understand how exactly ejaculations in men work. Before we talk about how an erection happens, let's briefly discuss why an erection happens. In the plateau stage, breathing becomes more rapid and the muscles continue to tense. abrasion throughout life. With 2D and 3D animations checked by medical doctors, we give information on certain diseases: what is it, wat are the causes and how is it treated? here for more information about the skin system of the Power your marketing strategy with perfectly branded videos to drive better ROI. The succeeding resolution stage brings a gradual return to the resting state that may take several hours. the specialised receptors of the frenar band, frenulum and These structures each have their own feeling, and each The "triple whammy" (loss of penile The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. This Performance Insiders content has been reviewed, as well as checked for facts, so as to guarantee the best possible accuracy. For a further look at this anatomy, including Nowadays, going to Youtube to watch movies and listen to music and entertainment is a daily necessity. While every effort has been made to follow citation style rules, there may be some discrepancies. Talk online now with a doctor and get fast 1-on-1 answers from the comfort of your couch. The one on the left is a flaccid penis, It's not filled with blood. I'll explain all that in a minute. in CIRP's Circumcision In that three to five milliliters, you actually pack about 300 million sperm. Clipping is a handy way to collect important slides you want to go back to later. Told in the style of a faux sex-education video, This Is Intercourse uses voice-over narration and animation. So you can see visually that the arterials on this side are much more dilated, that is, they let in a lot more blood, thus can cause an erection. Why Is Sex Dangerous For Older Men, But Recommended For Older Women? Direct link to ranaajrawat's post Could you please clarify , Posted 8 years ago. Stock Images, Photos, Vectors, Video, and Music | Shutterstock Don't forget to like our video and leave a comment. This video is a mash-up of variousdifferent MRI scans including a coupleFrench couple, a baby in the womb, ahorn player blowing his instrument and someone swallowing pineapple juice. In some animals, such as sheep and migratory birds, copulation occurs only seasonally. Direct link to Johnatan's post NE is responsible for con, Posted 8 years ago. On the outstroke the Let's go into the mechanisms of how this happens. mike davis davis development net worth. - Comprehensive clientele case taking - Excellent rapport building and client satisfaction - Treatment plans reviewing lifestyle, nutrition, herbal medicine, sleep hygiene, exercise, mental health etc. papers about the foreskin, explains the latest research at the showing pressure angle and point of contact. ", And cause issues with certain functions that are there for the system to work. This animation explains everything about the female orgasm. So that one's erect. duck chromosome number; portland to south australia border Due to this drop in testosterone product, many men notice undesirable effects on their daily lives. When we do that, you'll find that it looks something like this. approximately three by five inches, or a little smaller Uncircumcised Penis. In the woman, the vagina begins a series of regular contractions. If the reproductive act is complete, sperm cells are passed from the male body into the female, in the process fertilizing the females egg and forming a new organism. how to unhide mouse cursor windows 10; In this case, we're gonna cut away everything on his left side. involute animation. What Basically, this theory postulates that males and females who orgasm together . Just to orient you, this transverse view is of two different penises, side by side. Wheel of Fortune contestant answers food puzzle wrong, Rebel Wilson shows off diamond ring after PROPOSING to her GF, Miley Cyrus reveals track list from her upcoming album, Jennifer Aniston opens up about her relationship with sleep, Woman shares little-known dishwasher hack to get more space, Lizzo bangs her head on stage covering 'Du hast' by Rammstein, Drag Queen Copper Topp Queen performs at Honor Oak pub in Lewisham, Hailey Bieber beams with excitement for a Saint Laurent shoot, Miley Cyrus shares a teaser for new Backyard Sessions special, Nicola Peltz-Beckham shares funny video of herself dancing with husband, NBA Star Ja Morant holds gun up to his head while at a strip club, Woman who broke her back after gym accident learns to walk again, Moment teenager crashes into back of lorry after 100mph police race, Dacia's new Jogger estate transforms interior space into a bedroom, Buster Murdaugh 'in shock' finding out about Paul and Maggie's death, 'People are getting sick to death of Harry' says author Tom Bower, Met Office: It will be chilly in the northeasterly wind across England, TV commercials from childhood that still haunt viewers to this day, Pro-Ukrainian drone lands on Russian spy planes exposing location, Rebel Wilson reveals she was banned from Disneyland for 30 days, California moves closer to paying reparations to black people, Moment killer casually executes homeless man on St Louis sidewalk, Ukrainian soldier takes out five tanks with Javelin missiles, Mother of boy who dropped Quran says he has received death threats, Brave Ukrainian soldier tries to fight off Russian fire, Ukrainian city of Bakhmut 'practically encircled', says Wagner Chief, Sam Smith dances in a skirt to promote new single, Failed politician Katherine Deves clashes with trans protestors, British man arrested in Colombia with 23 kilos of cocaine in suitcase, Moment a 'sonic boom' is heard across central England, Trump says he'll support 'baby bonuses' and wants a 'baby boom', Mourners gather for funeral of 17-year-old Thai cave survivour, Donald Trump says "I am your retribution' at CPAC 2023, Sam Neil marches on the Harbour Bridge for World Pride, Aftermath of tanker explosion in Maryland seen in drone footage, Protests continue in Thessaloniki in aftermath of Greek train crash, Mother of baby Lucky reveals he is back home with his family, Driver dead after overturned tanker truck explodes in Maryland, Rebel Wilson reveals she met with Prince Harry and Meghan Markle, Stephanie Hsu wins Best Breakthrough Performance at Spirit Awards, Rooney Mara in plunging blazer at the Independent Spirit Awards, Quinta Brunson wins Best Lead Performance at 2023 Spirit Awards, Ayo Edebiri wins an Independent Spirit Award for 'The Bear', Charli D'Amelio at the 2023 Nickelodeon Kids' Choice Awards, Bebe Rexha shines in glittering jumpsuit at Kids' Choice Awards, Heidi Klum shows off her toned physique at Kids Choice Awards, Zach Mercer previews England vs France in the Six Nations, Rameka Poihipi scores 'quickest try of all-time', Arteta calls Arsenal's comeback victory a 'beautiful experience', Javi Garcia 'frustrated and disappointed' with loss to Chelsea, Graham Potter 'pleased' with side's performance in 1-0 win over Leeds, Bournemouth looks ahead for Liverpool game after Arsenal defeat, Cristian Stellini speaks on how Tottenham lost the game, Man City 2-0 Newcastle: Pep Guardiola praises Newcastle and Phil Foden, Max Verstappen and model girlfriend Kelly Piquet dance together, Harry Styles helps a young fan come out at his Sydney concert, Young woman with 'invisible illness' has ice cream thrown at car, Cast of The Crown seen filming scenes for the Golden Wedding, Moment fellow diner serenades Pippa Middleton in London restaurant, Mike Tindall in fun behind-the-scenes clip shoot for podcast tour, Dragon's Den: Entrepreneurs reveal they raised 125k from family, 'Super fit' 74-year-old Liverpool woman flaunts her toned figure, Hear the difference: Netflix introduces premium spacial audio feature, New crew celebrates as they arrive at International Space Station, First look into mysterious 30ft-long corridor in the Great Pyramid, Earth's geological past: A Model reveals Earth's surface change, SpaceX Dragon crew blast off for trip to International Space Station, Musk reveals renewable energy 'Master Plan 3' at Tesla Investor Day, Breakup of the asteroid Dimorphos after being hit by NASA spacecraft, Scientists think mythical 'hafgufa' was a Bryde's whale feeding, Video: Sex education does NOT work: 'There is no evidence' school initiatives cut rates of STIs or pregnancies - but offering teenagers cash could work.