• There Are More Than Two Human Sexes
    Articles,  Blog

    There Are More Than Two Human Sexes

    [♪ INTRO] In high school biology, we usually learn that the sexes in humans are fixed and concrete. Whether you’re male or female is black-and-white and rooted in your DNA: your 23rd pair of chromosomes is either two X chromosomes or an X and a Y. That’s it. End of story. And that’s essentially what scientists thought, too. But it turns out that sex isn’t that straightforward. In fact, biologists today are saying sex is a spectrum. And the scientific community is still working on understanding and respecting the people who fall in the middle of that spectrum. To get this out of the way right up front: we’re not…

  • 6 Gems and Minerals Much Rarer (and Cooler) Than Diamonds
    Articles,  Blog

    6 Gems and Minerals Much Rarer (and Cooler) Than Diamonds

    Thanks to Skill Share for sponsoring this episode of SciShow As the pun goes, geology rocks — but it isn’t all about rocks. Because rocks are usually made of minerals, and minerals are just plain cool in their own right. They have a pretty specific definition, but for the most part, minerals are solid compounds and inorganic elements whose atoms form an orderly, repeating pattern. Geologists have managed to identify over 5000 types of them, and while there’s a huge range of abundances, more than half of those 5000 are so rare that they’re found in five or fewer places. Those rare minerals aren’t things like diamonds or sapphires, either…

  • Futuristic Spy Tech Self-Destructs in Sunlight | SciShow News
    Articles,  Blog

    Futuristic Spy Tech Self-Destructs in Sunlight | SciShow News

    [ ♪INTRO ] It’s basically right out of a spy movie: a glider swoops into enemy territory at night, lands with some sort of secret message or item, and then vanishes without a trace in the pink light of dawn. “Now where did this come from?” our unwitting villain says, bending down to pick it up… Okay, okay, I might be getting overexcited. But as of this week, a disappearing plane could really exist. At a meeting of the American Chemical Society, researchers announced that they have created a material that vaporizes in sunlight. It’s all thanks to the incredible power of chemistry. The material is a polymer known as…

  • Are Electric Cars Really More Environmentally Friendly?
    Articles,  Blog

    Are Electric Cars Really More Environmentally Friendly?

    [INTRO ♪] Telling people that buying an electric car is a great way to fight climate change is a pretty reliable way to start an argument in some circles. People will say that you still burn fossil fuels with electric cars – it just happens at the power plant instead of the engine. And while that’s at least partly true, over their lifespans, electric cars don’t consume anywhere near the fossil fuels that gas-powered cars do — especially in the United States. With electricity getting cleaner all the time, they’re even better than you might expect. There are a few variables to keep in mind though, starting with the cars…

  • 5 Groundbreaking Women in Engineering
    Articles,  Blog

    5 Groundbreaking Women in Engineering

    Thanks to Emerson for supporting this episode of SciShow. To learn more, visit Emerson.com/WeLoveSTEM. [♪ INTRO] After many years of ignoring their stories, the world has finally started to talk about women in science — which is amazing! Everyone should know about all the women in the past and present who have kicked butt doing amazing research. But we really can’t talk about women in STEM enough — and we definitely don’t talk as often as we should about women who have done cool work in science’s more applied sibling, engineering. It’s a pretty wide-ranging field, and like with more basic science, it’s had women making big advances in it…

  • 5 Devastating Security Flaws You’ve Never Heard Of
    Articles,  Blog

    5 Devastating Security Flaws You’ve Never Heard Of

    [♪ INTRO] Nobody wants to get hacked. Victims can have their identities stolen, their private photos leaked, or their computers infected with malicious software, AKA malware. Hackers can even block or quietly replace websites, software, and files. Whatever Hollywood thinks, though, hacking doesn’t magically happen when you type really fast. There has to be some security vulnerability, some hole that lets the hackers do something they shouldn’t be able to do. The most vulnerable component is usually the one sitting between the chair and the keyboard. But often there are hidden flaws in the technology itself. In 2017 alone, companies and researchers reported nearly 15,000 security vulnerabilities in tech products.…

  • Can a Hot Drink Cool You Down?
    Articles,  Blog

    Can a Hot Drink Cool You Down?

    [♪ INTRO] When the heat of summer sets in, people flock to the beaches or head to the mountains to cool off. But in some arid parts of the world, on hot, dry days, people cool off by drinking hot beverages. Which doesn’t make a lot of sense, if you’ve never heard of the practice. If a cup of hot cocoa on a cold, snowy day makes you feel warmer, how could a hot drink also make you feel cooler? But there’s evidence to back up this age-old tradition, if the conditions are just right. In a study published in 2012, subjects exercised on a stationary bike. And they drank…

  • Bitcoin: How Cryptocurrencies Work
    Articles,  Blog

    Bitcoin: How Cryptocurrencies Work

    Say there’s a coin that’s currently worth hundreds of U.S. dollars, but it’s not made of gold, or platinum, or any precious metal. In fact, it’s not the kind of coin you can hold in your hand or stick in a piggy bank. It’s a digital currency, which means it only exists electronically. I’m talking about bitcoin. Bitcoin doesn’t work like most money. It isn’t attached to a state or government, so it doesn’t have a central issuing authority or regulatory body. Basically, that means there’s no organization deciding when to make more bitcoins, figuring out how many to produce, keeping track of where they are, or investigating fraud. So…

  • 5 Delightful Color-Changing Minerals
    Articles,  Blog

    5 Delightful Color-Changing Minerals

    Thanks to Generation Genius for sponsoring this episode of SciShow. Go to generationgenius.com and check out their next-generation science videos for grades K through five. [♪ INTRO ] From the bedrock that supports buildings, to the bones that let us dance the night away, minerals are pretty amazing. And with their rainbow of colors, they also add some sparkle to our lives. Normally, individual minerals are one color, that’s not always the case. Some look multi-colored upon a single glance, and others look different depending on whether you’re looking at them in the sun or under incandescent light. Some minerals even look different if you rotate them. When you do,…