Which Way Is Down?

Hey, Vsauce. Michael here. Down here. But which way is down? And how much does down weigh? Well, down weighs about a 100th of a gram per cubic centimeter. It...

What Is Life? Is Death Real?

Life is fundamentally different from dead stuff—or is it? Physicist Erwin Schrödinger defined life this way: Living things avoid decay into disorder and equilibrium. What does this mean? Let’s pretend...