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- How Your Brain Works
- How Your Heart Works
- How Cells Work
- How Performance-enhancing Drugs Work
- How Blood Works
It's another one of those things your parents told you to persuade you to eat vegetables. But besides turning orange, if you ate a bunch of carrots, would you develop superhuman vision?
Why don't you have two hearts? Here's a hint: It's the same reason why you have one liver, but two eyes. Would a second heart help you live better?