science,solar panel,airplane
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The plane looks like something you might install on your roof, although if all goes well during test flights over the San Francisco Bay Area that begin next week, it won't actually end up there. It's basically a giant wing with a glider's fuselage and a Port-A-Potty attached.
Via: Vox
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You've probably learned about vestigial organs in Biology class by now. There are a lot of things that aren't important to humans any more but we've still held onto them in some way. If you've ever seen someone wiggle their ears, it's obvious. 

This video shows some of those unnecessary parts and why we used to have them. It also goes into detail about the way that some humans have actually lost those extra pieces. 



That's evolution at work. 

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