Even after death, people's fingers can still twitch.
Spinach may have done the trick for Popeye, but it doesn't add muscle to the rest of us.
While steroids enhance muscle growth, they also cause liver damage and 'roid rage.
Running speed and strength depends on the type of muscular tissue one is born with.
Recent technological breakthroughs help prosthetics operate convincingly like the real thing.
On this episode, we'll journey into the kidneys to find out what makes kidney stones hurt so much.
Some aquatic animals have a sixth sense that allows them to detect electrical fields in water.
Chemical reactions can cause decomposing bodies to twitch, move, and groan.
Anyone who spends an extended period of time in space faces serious medical problems due to the near total absence of gravity.
Some species use their ears not just for hearing, but for communicating as well.