Many animal species stuff themselves with toxic chemicals for protection, which forces them to use a handful of distinct strategies to avoid becoming victims of their own weapons.

The ancestors of gars, horseshoe crabs and coelacanths looked almost the same as their modern relatives. Darwin called species like these “living fossils'' because they seem like they are evolutionarily frozen in time. But Darwin was wrong.

We negotiate all the time at work -- for raises, promotions, time off -- and we usually go into it like it's a battle. But it's not about dominating, says organizational psychologist Ruchi Sinha. It's about crafting a relationship,...

Sheryl Lee Ralph is a force, delivering iconic performances both on stage and screen. But she didn't always know if she'd make it big. In a lively talk sparkling with actionable advice, she shares how her struggles taught her what it...

Rejection hurts. It's incredibly painful to feel like you're not wanted — and we do mean painful. Researchers found that we relate rejection to being "hurt," using terms like "crushed" or "broken-hearted." So, why does rejection trigger...

Expired medicine might seem like a weird concept because a lot of it doesn’t get moldy or slimy like old food. Is it really a big concern?

Sometimes, when you bump your elbow really hard, your arm can get all weird and tingly, all the way down to your fingers! Some people call that "hitting your funny bone," but what you're hitting isn't a bone at all!

Some people (maybe you!) can't eat certain foods because they're allergic to them. People can have an allergic reaction to almost any kind of food, or even other things, like bee stings! But all allergies have something in common: our...

You might be familiar with the concept of self-harm, but it isn’t just physical. As it turns out, people can harm themselves through the anonymity of the internet.

Generally, humans try to avoid getting stung by insects. However, in the name of science, the betterment of humanity, and pure curiosity, there are brave people out there who willingly subject themselves to the business end...

We all know that brushing our teeth is important but now with this experiment you can actually SEE how brushing keeps your teeth clean!

Objectively, some shows end with rough final acts, but we are finding that this isn’t the only factor in our discontent. Unsatisfactory finales also reflect common types of relationships we build with fictional characters.

Have you ever looked up at night and seen a streak of light flash across the sky? Some people call that a "shooting star," but it's not actually a star at all! Join Jessi and Squeaks to learn what shooting stars really are and how they...

If you've ever had a little cut or scratch, you know it doesn't take long for it to heal! But do you know how different parts of your body work together to fix you up good as new when you're hurt?

Although it's funding is nowhere NEAR the amount Hollywood invests in moviemaking each year, crowdfunding is a way better indicator of what the audience wants to see, the one area Hollywood has failed in time and time again. Will...

"Where does it hurt?" It's a question that activist and educator Ruby Sales has traveled the US asking, looking deeply at the country's legacy of racism and searching for sources of healing. In this moving talk, she shares what she's...

Dragonflies are totally awesome! Join Jessi and Squeaks as they learn about these really large and really cool insects!

Squeaks got hurt playing outside and had to get stitches! Jessi explains what happens at the doctor's office and how stitches help us heal!

Don't make people pay for music, says Amanda Palmer: Let them. In a passionate talk that begins in her days as a street performer (drop a dollar in the hat for the Eight-Foot Bride!), she examines the new relationship between artist and...

That terrible pain the befalls us when enjoying an icy treat! How does that happen? Is there a cure? Let Hank explain.

Define "beach." | Tangents Clip #shorts #SciShow #SciShowTangents

Getting kicked anywhere hurts, but getting kicked in the groin REALLY hurts for a few different reasons.

From MMR boosters to tetanus, you'll probably get a lot of shots in your life. And one thing you might notice is that some of them don't feel like much, but some of them can make your arm reallllly sore! Why is that?

Some people take aspirin or ibuprofen to treat everyday aches and pains, but how exactly do the different classes of pain relievers work? Learn about the basic physiology of how humans experience pain, and the mechanics of the medicines...