What Would Happen If the Planets Lined Up?

Planetary alignments: They’re the favorite astronomical scenario of kooks, con artists, and Hollywood producers everywhere. But has it ever happened? And what would it do to Earth if it did? 

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.

SciShow shirts for sale! We haven’t released any new SciShow merch in a very, very long time. But now, you can get this fancy schmancy sleek and super cool SciShow logo shirt. It’s printed on a nice, soft black tee. These are available for preorder now and will ship some time near the end of October.

SciShow shirts for sale! We haven’t released any new SciShow merch in a very, very long time. But now, you can get this fancy schmancy sleek and super cool SciShow logo shirt. It’s printed on a nice, soft black tee. These are available for preorder now and will ship some time near the end of October.

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?

The Science of Wildfires

So, what is fire, exactly? What causes fires in the wild, and how do we put them out? SciShow answers your burning questions about the science of fire. (See what we did there?)

2 Weird Experiments in Human Space Flight

SciShow Space News reveals two weird experiments in human spaceflight: one showed us what it really feels like to walk on the moon, the other put ordinary people through space flight simulation to see how they did. Find out inside!

The Future of Our Sun and Earth

SciShow Space gives you a blow by blow account of what’s going to happen to the sun — and Earth.

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. 
-Hank

3 Reasons Why Ticks Suck

Find out why these arachnids are among the least B of humanity’s BFFs. Yeah, they’re blood-sucking parasites, but that’s not all of it!