SciShow
What Does SPF Mean?
Sunscreen comes in different levels of SPF, or sun protection factor, but what does that mean for your skin and the ultraviolet radiation hitting it? Olivia explains the science of SPF.
SciShow
The Science of Tear Gas
There’s a lot of confusion about tear gases—what they are, what they do, and whether they can cause long-term harm. Here's what we know.
SciShow Kids
Get to Know a Dinosaur!
Do you have any questions about dinosaurs, or anything else about nature, or outer space, or machines?
TED Talks
Dan Barber: How I fell in love with a fish
Chef Dan Barber squares off with a dilemma facing many chefs today: how to keep fish on the menu. With impeccable research and deadpan humor, he chronicles his pursuit of a sustainable fish he could love, and the foodie's honeymoon he's...
SciShow
Why People are Always Fighting Over the Thermostat
Negotiating thermostat settings can be really frustrating, but your officemate isn't trying to freeze you out on purpose. Stefan explains the science behind why people experience temperatures differently. Fun fact: Stefan wears a jacket...
SciShow
Why Do Bug Bites Itch?
Hank explores a vexing question asked at picnics and beach parties everywhere: Why do bug bites itch? To help you understand the answer, he takes you into the blow by blow of a bug bite which, we warn you, is pretty horrifying.
SciShow
10 Surprising Chemicals Your Body Makes
Everything is made of chemicals, including the human body, but there are some especially weird ones
SciShow
Why Do We Get Freckles?
Your parents may have told you that every freckle on your face was a kiss from an angel, but SciShow is here to ruin that delusion for you.
SciShow Kids
Why Do I Get Wrinkly Fingers in the Bath?
Have you ever noticed that your fingers and toes are all wrinkly and funny looking after you spend a lot of time in the water? Well, Jessi wants to know why that happens! Join her to find out the answer!
TED Talks
TED: Can light stop the coronavirus? | David Brenner
Far-UVC light is a type of ultraviolet light that kills microbes and viruses and, crucially, seems to be safe to use around humans. Radiation scientist David Brenner describes how we could use this light to stop the spread of SARS-CoV-2,...
SciShow
SciShow Quiz Show: Why Humans Are Weird!
In this explosive episode of SciShow Quiz Show, Hank Green and SciShow writer Dave Loos test their knowledge of diamonds, the environment, and the many reasons why humans are very strange creatures.
TED Talks
TED: The restorative power of medical tattoos | Becky Barker
Tattoos can transform and empower people, with some seeking them out to reconnect with their bodies due to scarring, physical abnormalities or the aftermath of a procedure or illness. Paramedical tattooist Becky Barker shares the art and...
SciShow
No Hips, No Problem: Better Hip Replacements From Snakes
If you want to make a better hip replacement, who better to turn to than… a snake? While these hip-less creatures might seem like a weird choice for help with this particular issue, a major part of creating comfortable, long-lasting...
TED-Ed
TED-Ed: Why are sharks so awesome? - Tierney Thys
Sharks have been celebrated as powerful gods by some native cultures. And today, sharks are recognized as apex predators of the world's ocean. What is it that makes these fish worthy of our ancient legends and so successful in the seas?...
SciShow Kids
Why Do We Get Goosebumps?
Jessi got so cold outside that she got goosebumps! Join her and Squeaks as they learn what causes your body to make these bumps in the first place.
SciShow
Why Does My Face Turn Red When I'm Angry?
Have you ever wondered why your face turns red when you’re angry? Check out this SciShow Quick Question to learn why!
TED Talks
TED: Hidden miracles of the natural world | Louie Schwartzberg
We live in a world of unseeable beauty, so subtle and delicate that it is imperceptible to the human eye. To bring this invisible world to light, filmmaker Louie Schwartzberg bends the boundaries of time and space with high-speed...
MinuteEarth
Why Does Wine Make Your Mouth Feel Dry?
Astringent plant chemicals called tannins bind proteins on mucous membrane and skin, generating a prickly, puckery mouthfeel from foods and letting us “tan” skins into leather. ___________________________________________ If you want to...
TED Talks
Dean Ornish: Your genes are not your fate
Dean Ornish shares new research that shows how adopting healthy lifestyle habits can affect a person at a genetic level. For instance, he says, when you live healthier, eat better, exercise, and love more, your brain cells actually...
TED-Ed
TED-Ed: Could your brain repair itself? - Ralitsa Petrova
Imagine the brain could reboot, updating its damaged cells with new, improved units. That may sound like science fiction - but it's a potential reality scientists are investigating right now. Ralitsa Petrova details the science behind...
SciShow
Why Does Body-Temperature Air Feel Hot?
You'd think that air that was the same temperature as your body would feel neutral, but if you've ever been outside when it's 37 degrees Celsius out... you know that's not the case!
Amoeba Sisters
Bacteria (Updated)
Let the Amoeba Sisters introduce you to bacteria! This video explains bacterial structure, reproduction, and how not all bacteria are "bad!" Video also briefly mentions endospores, plasmids, and bacteria transformation. Table of...
SciShow
Why Do Batteries Taste Sour?
If you put your tongue on a 9-volt battery it might taste sour, kind of like lemonade, but why does that shock have a flavor?