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We asked a dermatologist to explain the scientific reasons that some men aren't able to grow thick, dense facial hair. Dr. Jennifer Chwalek is a Board Certified dermatologist at Union Square Laser Dermatology in New York. Chwalek explained that an inability to grow thick facial hair is not directly related to low levels of testosterone. Facial hair growth is largely determined by genetics, which can determine the number of hair follicles a person has, as well as how the follicles react to a byproduct of testosterone known as dihydrotestosterone. ------------------------------------------------------ #Beard #FacialHair #ScienceInsider Following is a transcript of the video: Narrator: Look at that beard. The density. The thickness. It's what a beard is supposed to be! Not this. This is my beard, if you even want to call it a beard. This footage was taken after I let it grow for two weeks. Two weeks! It's thin, patchy, and in some spots there's no hair at all. Sad. But let's look at this one again. This is Kevin. We're around the same age, both Caucasian males of Irish descent. You could say we have a lot in common, except in the facial hair department. So, I asked a dermatologist about why he's able to grow a beard and I'm not. Dr. Jennifer Chwalek: It's based on genetics as well as hormones. Some men, you know, have more hair follicles, so they can grow denser, coarser beards than others. Testosterone gets converted in the hair follicle to a more potent form called dihydrotestosterone. Some hair follicles have receptors on them that are very sensitive to this higher form of testosterone, dihydrotestosterone, and that will stimulate hair growth. Graham Flanagan: How would you characterize my facial hair? Dr. Chwalek: I'd say it's like, sparse, and you have light-colored hair, so it doesn't show up quite as much. Flanagan: I can't really grow a great beard. It's been a problem. I want one. I wanna look like my colleague, Kevin. I mean, look at that beard. It is just glorious. Why can't I grow a beard like Kevin? Dr. Chwalek: Well, Kevin has some good hair genes, so because of that, the hair follicles on his face are more sensitive to the effects of a form of testosterone called dihydrotestosterone which can help to stimulate thicker, coarser, longer hair growth in some areas of the body like the beard area. Narrator: Beards and facial hair have long been associated with masculinity and virility. I began to wonder if my inability to grow thick facial hair like Kevin makes me less of a man. Flanagan: Does the fact that I can't grow a beard, does it make mean that I have low testosterone? Dr. Chwalek: No. Men who can't grow a beard or have patchy beards usually have normal testosterone levels. It isn't a reflection of having low testosterone or being deficient in testosterone. Flanagan: So, you can still be virile — Dr. Chwalek: Right. Flanagan: And grow a crappy beard like this? Dr. Chwalek: Yes. Flanagan: Okay, good. Narrator: And in fact, there are some ways to increase the chances of growing facial hair, but shaving more often isn't one of them. Dr. Chwalek: So, the idea that shaving can impact hair growth is actually a myth. When you're shaving, you're just cutting the hair off at the surface of the skin, and what's controlling the hair growth is really occurring deeper in the skin. So, it shouldn't have any impact on how quickly the hair grows, or how dense the hair grows. People have tried topical Rogaine or Minoxidil. These things may stimulate a little hair growth, but assuming it's due to genetics, then you're kind of stuck with what you have. Flanagan: It's all about the sensitivity of the hair follicles and how they interact with this — Dr. Chwalek: Dihydrotestosterone or androgens in the blood. Flanagan: So, you're saying that, that his hair follicles are "sensitive." Dr. Chwalek: Yes. Flanagan: See, mine aren't. Dr. Chwalek: Right. Flanagan: They aren't sensitive. They're like rocks. They have no sensitivity at all. Okay, so I win that! Dr. Chwalek: Right. Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/science Science Insider on Facebook: https://www.facebook.com/BusinessInsiderScience/ Science Insider on Instagram: https://www.instagram.com/science_insider/ Business Insider on Twitter: https://twitter.com/businessinsider Tech Insider on Twitter: https://twitter.com/techinsider ------------------------------------------------------ Why Some Men Can't Grow Beards

GlassCast 3 epoxy resin was from https://www.glasscastresin.com Full project details ▼ Video tutorial showing how we laid this penny floor using GlassCast 3 epoxy resin and lots of pennies! We've included all the steps along the way including calculating how much resin you'll need, laying out and grouting the pennies and pouring the resin. Links to all the products used in the project: ► GlassCast 3 Epoxy Resin https://www.glasscastresin.com/glasscast-3-epoxy-coating-resin ► Ancillaries available here https://www.glasscastresin.com/ ►FREE eBook available to download here https://media.glasscastresin.com/project-downloads/How-to-Make-a-Resin-Coated-Penny-Floor-Handbook.pdf If you have any questions, please just ask in the comments below! #epoxyresin #diy #pennyfloor

GlassCast 3 Epoxy Resin was from https://www.glasscastresin.com Full project details ▼ Video tutorial showing how we created this eye-popping neon yellow designer table using GlassCast 3 epoxy resin, some redwood planks and a neon yellow pigment. We've included all the steps along the way including setting up barriers, calculating how much resin you'll need, laying out the planks, pouring the resin in layers and then finishing the table. Links to all the products used in the project (on the GlassCast Resin website): ► Polypropylene Sheet https://www.glasscastresin.com/polypropylene-sheet ► Neon Tinting Pigment https://www.glasscastresin.com/resin-tinting-pigments ► Release Tape https://www.glasscastresin.com/resin-barrier-release-tape ► GlassCast 3 Epoxy Resin https://www.glasscastresin.com/glasscast-3-epoxy-coating-resin ► Abrasive Paper https://www.glasscastresin.com/abrasive-paper ► NW1 Polishing Compound https://www.glasscastresin.com/nw1-epoxy-cutting-compound ► Square Industrial Designer Legs https://tinyurl.com/yal6kg3n Free downloadable eBook for the project - https://media.glasscastresin.com/project-downloads/How-to-Make-a-Neon-Resin-Plank-Table-Handbook.pdf If you have any questions, please just ask in the comments below! #epoxyresin #table #neon

What to do with a stamp collection? If you inherited a stamp collection, here is a set of instructions about how to store, value, keep or sell the stamps. Dealers: APS (USA) : https://stamps.org/Dealers PTS (UK): http://thephilatelictraderssociety.co.uk/member-search/ Donate your stamps: USA: stamps.org UK: Stampactive https://www.stampactive.co.uk/about-us/ ASPS: http://www.scottishphilately.co.uk/index.php OxfamGB: https://www.oxfam.org.uk/donate/donate-goods/what-you-can-donate/donating-stamps-and-coins Stamp Show Videos: Visiting a Stamp show: https://www.youtube.com/watch?v=5bImEro1G30 Stampex: https://www.youtube.com/watch?v=-sZC-Jpm5dg&t=40s Stamp Art! Art Stamped: https://www.artstamped.com/ Video: https://www.youtube.com/watch?v=-sZC-Jpm5dg&t=40s Additional Resources APS "Inherited a Stamp Collection": https://stamps.org/Inherited-a-Collection Punk Philatelist: https://punkphilatelist.com/2015/07/21/i-found-an-old-stamp-album-am-i-rich/ PTS "Value My Stamps": http://thephilatelictraderssociety.co.uk/value-my-collection/

Here's a quick video on the Coriolis effect! music by: https://www.bensound.com/

How a cheesy joke from the 1830s became the most widely spoken word in the world. Subscribe to our channel! http://goo.gl/0bsAjO OK is thought to be the most widely recognized word on the planet. We use it to communicate with each other, as well as our technology. But it actually started out as a language fad in the 1830’s of abbreviating words incorrectly. Young intellectuals in Boston came up with several of these abbreviations, including “KC” for “knuff ced,” “OW” for “oll wright,” and KY for “know yuse.” But thanks to its appearance in Martin Van Buren’s 1840 presidential re-election campaign as the incumbents new nickname, Old Kinderhook, OK outlived its abbreviated comrades. Later, widespread use by early telegraph operators caused OK to go mainstream, and its original purpose as a neutral affirmative is still how we use it today. Vox.com is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. 

Fireplace 10 hours in full HD resolution. 10 hours burning logs loop play.

Bob Ross fans! It’s ‘time’ for some happy trees, and we’ve got just what you need: https://pxlfy.me/BobRossWatchMightyMojoToys Bob Ross, the host of television's favorite art show The Joy of Painting, paints one painting - Grandeur of Summer - with complete instructions for you to follow in this exclusive 60 minute video. Bob goes into the entire ''how to'' details for each painting providing you with excellent reference tools for your home studio. This episode was never seen on television! Subscribe for full length episodes! -- http://bit.ly/BobRossSubscribe

We have heard the theory: water going down the drain spins in different directions depending on which hemisphere you're in. But what if you are at the Equator and then move a few meters towards the Southern hemisphere, then move back towards the Northern hemisphere and try the same thing? Can a few meters make a difference? Watch this and let us know your thoughts! Source & embed code: https://rumble.com/v2ze9q-water-rotation-in-the-two-hemispheres-and-on-the-equator.html For licensing, please email licensing@rumble.com

Why do we yawn? If you think the answer is BOR-ing, then maybe your brain's just overheated. Let Hank explain the new thinking behind why we ... hold on ... *yawn*. Excuse me. Help support us by subscribing to our page on Subbable: https://subbable.com/scishow ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Thanks Tank Tumblr: http://thankstank.tumblr.com Sources: http://www.upenn.edu/gazette/1109/expert.html http://news.nationalgeographic.com/news/2011/11/111115-yawning-mystery-brains-sinuses-health-science/ http://www.nytimes.com/2007/07/03/health/03insi.html?_r=0 http://serendip.brynmawr.edu/exchange/node/1912 http://www.loc.gov/rr/scitech/mysteries/yawn.html http://www.smithsonianmag.com/science-nature/why-do-we-yawn-and-why-is-it-contagious-3749674/?no-ist https://www.princeton.edu/main/news/archive/S31/64/49G23/index.xml?section=newsreleases http://www.psychologytoday.com/blog/brain-sense/201111/why-do-you-yawn-when-youre-not-sleepy http://www.epjournal.net/wp-content/uploads/ep0592101.pdf

If men can't nurse, then why do they have nipples? The answer has less to do with evolution and more to do with your personal development as a teeny tiny embryo. Short version: We're all girls -- at least at first. Hank explains! Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? 

Why does ice float in the cool summer drink of your choice? And why don't ponds and lakes freeze from the bottom up, killing all the fish? Find out with the latest Naked Science Scrapbook, where we'll see that it's all down to the weird and wonderful water molecules...More videos and podcasts from http://www.thenakedscientists.com

http://www.matthewbey.com If you've ever wanted to watch paint dry, you can now do it in half the time through the wonders of time lapse. I stumbled upon Space Squid contributor David Johnston as he was in the middle of an experiment in layering of patina. Because of the 94-degree Texas sun, it didn't take all that long for the transformation to occur. Paint dries quick in Austin.

Sir David Attenborough researches the life of ants in Australian mangroves in this fantastic BBC footage. Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth This is a commercial channel from BBC Studios. Service & Feedback https://www.bbcstudios.com/contact/contact-us/