Featured in ask popsci

You can injure yourself stretching—but it’s not easy
Can you overdose on weed?
Is it possible to boost your immune system?
Why don’t we grow to be 10 feet tall?
Why you’re more likely to cry on an airplane
Why do we get goosebumps?
Why do I feel dizzy after spinning?
Will cracking my knuckles give me arthritis?
What would happen if the moon suddenly disappeared?
Why hasn’t the sun burned out yet?