Does My Voice Really Sound Like That?

Take it from an expert: It’s weird to hear how your voice really sounds. But why does it sound different to you than everyone else. Hank explains — in a deep, resonant voice.


John’s response to Alaska having the largest amount of fossil fuel in the US.

John’s trying to make hectacre a thing. Don’t let him make it a thing!

Do I Only Use 10% of My Brain?

SciShow debunks the myth that you only use 10 percent of your brain. So, how much do you really use? And how do we know?

What Causes Brain Freeze?

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

Watch more videos like this in our Quick Questions playlist, where we set you straight on all the little mysteries of life, like “Why do we yawn?” “Why does swiss cheese have holes?” and “Do my feet smell like doritos?”

Why are eggs shaped weird?
There are two questions here…first, what’s the evolutionary advantage to having egg-shaped eggs.
We’re not precisely sure but there are two prevailing theories. First, the “egg” shape is a sphere tapered to a point on one end creating a kind of wedge. The muscles inside the bird squeeze down on that wedge to push the egg out blunt-end first. A sphere would be much more difficult to squeeze out. (Not that either way sounds particularly fun to me.)
Second, a spherical egg would be able to roll forever in any given direction while an egg-shaped egg, when shoved, rolls in a circle around a central point, which would increase the likelihood that eggs would stay in a nest. This theory is reinforced by the fact that cliff-dwelling birds have an even more pronounced egg shape. 
The other question in your question is how do birds make their eggs egg-shaped. Obviously, if it were left up to simplicity, the egg would be a perfect sphere. Unfortunately, I do not know the mechanics of how this shape is actually achieved inside of a bird…and I really would like to know. 

Coming Soon: 12 Billion People on Earth

SciShow News explains the science behind the latest virus outbreak in the U.S., and examines surprising new predictions about the future of the world’s human population.

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Quiz Show: Vlogbrothers Face-Off: Hank v. John! 

Welcome back to SciShow Quiz Show! In this episode Hank will be competing with older brother John in a battle of science related trivia on behalf of Subbable subscribers Anna Dilley & Andrew Villarreal. 

What would happen if you microwaved a person?

They would get warm…and then hot…and then very hot…and then they would die. But if you only zapped them for a few seconds…it would just feel like a pleasant warming sensation. Unlike heating through infrared radiation (which is how the sun or a fire would heat you) microwave radiation would heat you from the inside, areas where you have more water stored like muscles and fat would warm fastest. My grandfather served in the Korean War and he once told me that they’d actually stand in front of microwave antennas to warm themselves on wet, cold nights. He lived to be 92 years old so…I guess it’s not /always/ dangerous. 


Blue Whales and The Smartphone Morality Experiment

Hank shares news about the biggest animal in the history of ever — blue whales — and explains the lessons learned in a new study of human morality, using smartphones.

Why does pepper make us sneeze? ALSO, is it bad if someone snorts pepper, cause my friend did that for a dare during physics class today.

Sneezing is an involuntary reflex to try and get irritants out of our nose and pepper contains a chemical, piperine, that irritates the mucus membrane of the nose by activating your pain and acidity receptors. So, once it’s in there, your body will totally freak and try to get it out of there…with sneezes…lots of sneezes. As for how safe it is…it’s never good to intentionally irritate your mucus membranes, but as long as it doesn’t become a habit (and I can’t see why it should) your friend should be fine.