Featured in ask anything
Will cracking my knuckles give me arthritis?
The splintering sound makes the habit seem far worse than it is.
What would happen if the moon suddenly disappeared?
Life as we know it probably wouldn’t exist.
Why hasn’t the sun burned out yet?
Our planet's personal space heater is incredibly efficient.
Why do marathon runners get the runs?
It doesn't just work your leg muscles—racing is rough on your intestines, too.
When you get a stitch in your side, what’s really going on?
Doctors still don’t know what causes it, or how to stop it
Is it safe to take expired medication?
They might be okay, but you probably shouldn't.
If everyone became vegetarian, would the planet actually be better off?
Cutting back on red meat is probably the best place to start, but eating the right types of veggies is important, too.
Does a fever always mean you have an infection?
Our fear of fevers made us terrified of even a slight increase in body temperature.
What can genetic testing really tell you?
Risk is not a diagnosis.
Does drinking hot liquids on a hot day actually cool you off?
Yes, technically, but not nearly enough.