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    Death’s end

    warning cobalt exposure is irritating long-term exposure can be toxic or even lethal manual rock crushing is dangerous and loud so follow OSHA safety guidelines our skin to reduce exposure to toxic materials make sure a first-aid officer is on hand for emergencies and don’t forget to wear your hearing protection the objective of this video is to look at the use and extraction of tantalum and to explore the political science readings fellow proles in today’s research we’re going to look in an element that’s already incredibly useful but nevertheless shows incredible promise in almost every single branch of science that’s right we’re looking at tantalum I’m going to…

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    Robots Can Have Skin Now | SciShow News

    [ ♪INTRO ] Robot designs have come a long way. But there’s one thing we haven’t been able to give our mechanical creations: skin. I mean, obviously we’ve been able to coat robots in plastics that look like skin — or, just enough like skin to be terrifying. But a sensitive outer layer that really acts like skin has remained out of reach… until now, apparently. Last week, scientists publishing in the journal Proceedings of the IEEE outlined how they made the first autonomous robot with full-body skin. Artificial skin is a holy grail of sorts for robotics because a better sense of touch could help robots in a lot…

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    5 Creepy Weather Phenomena That Shouldn’t Be Allowed

    [INTRO ♪] Over the years, we’ve talked about some weird weather here on SciShow— from red sprites to thundersnow to spider rain or murderous fogs. But all that still hardly scratches the surface of how weird weather can get. From blood rain to volcanic tornadoes, here are five more kinds of weird, wacky, wonderful and not-so-wonderful weather that happened right here on Earth. Let’s start with a couple ways rain can be… different from what we’re used to. In the Ancient Greek epic The Iliad, the god Zeus is said to have “showered bloody raindrops on the earth.” And whether that was meant literally or not, one thing is for…

  • Can You Be Allergic To Sunlight?
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    Can You Be Allergic To Sunlight?

    ♪ INTRO ♪ We all know that the sun can be dangerous. The UV radiation that beams down on you at the beach can damage your DNA, giving you painful burns and eventually, possibly cancer. That should be reason enough to wear sunscreen. But for some people, sunlight means hives or itchy rashes. That’s right, you can be allergic to the sun. If you have a condition called solar urticaria, big, itchy welts develop within minutes of sun exposure. These hives die down within a day, but as you can imagine, this disease seriously puts a damper on going outdoors. Scientists don’t fully understand why this happens, but they think…

  • 5 Things Your Hair Can Tell You About Your Health
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    5 Things Your Hair Can Tell You About Your Health

    [ intro ] If you’ve ever dyed your hair the colors of the rainbow, or gotten a dramatic updo for a special event, you know that we often use hair for more than just keeping our heads warm. It can be an expression of our personalities, too. But how your hair grows — or doesn’t — can also be a sign about your personal health. And while that’s really convenient and everything, it’s also… pretty weird. Like, your hair is basically just a bunch of protein clumps, so it doesn’t seem like it should be able to tell you about other things happening in your body. But in reality, it’s…

  • The Science of Getting (and Getting Rid of) a Tattoo
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    The Science of Getting (and Getting Rid of) a Tattoo

    Nearly one in five people in America has a tattoo. So these permanent, portable pieces of art are clearly an important part of our culture — but how do they work? What makes a tattoo permanent, and can you really get rid of it? Well, tattoos work by taking advantage of the structure of your skin, and the composition of the ink that’s used. Your skin, for starters, is made up of three main layers of cells. On top, there’s the epidermis, which is exposed to the environment. Below that, there’s the dermis, and it’s full of hair follicles and sweat glands. And below that, you find the subcutaneous layer…

  • You Don’t Need to Worry About Yellowstone (or Any Other Supervolcano)
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    You Don’t Need to Worry About Yellowstone (or Any Other Supervolcano)

    Thanks to Brilliant for supporting this whole week of SciShow! Go to Brilliant.org/SciShow to learn more. [ ♪INTRO ] You’ve probably heard of supervolcanoes. They’re like normal volcanoes, except … you know … more volcano. You’ve probably also heard that some of them — like Yellowstone — are ticking time bombs ready to go off at any moment and wreak havoc on civilization as we know it. This idea pops up in lots of scary news headlines and thrilling action movies, and let’s be honest, with the word “super” in the name, it’s just a matter of time before the Avengers have to fight one somehow. And yet, despite all…

  • Nadine The Robot Is Amazing And Creepy
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    Nadine The Robot Is Amazing And Creepy

    You are about to enter another dimension. A dimension not only of sight and sound, but of mind. A journey into the wondrous land…of robotics. There’s a sign post up ahead, next stop: SciShow News. This week, scientists at Nanyang Technological University in Singapore unveiled Nadine, a robot receptionist with soft skin, real hair, and an uncanny, echoey speaking voice that comes from somewhere other than its face, even though its lips move when it talks. It will reach out with jerky motions to shake your hand, remember you and your previous conversations, and it can even use body language to show happiness and sadness. Nadine is the next generation…

  • Should You Use Hydrogen Peroxide to Clean Wounds?
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    Should You Use Hydrogen Peroxide to Clean Wounds?

    If you know any kids — or remember being one yourself — you might know that they can be… an active bunch. They tend to do a lot of running around, bouncing off of walls, and just generally trying to get places without always looking where they’re going. Which can mean a lot of scraped knees and elbows. And sometimes, hydrogen peroxide. A lot of people use hydrogen peroxide to clean wounds, and it isn’t exactly pleasant: in addition to making the scrape hurt even more by activating the receptors that make you feel pain, the wound gets all weird and bubbly. But the reason it bubbles is also the…