Water is a very heavy substance -- just one gallon weighs 8 pounds. Check out this HowStuffWorks podcast to learn more about how the passage of water affects your weight.
BrainStuff
2,611 clip(s)
What Happens When Your Immune System Turns on You?
How Can Slime Mold Think Without a Brain?
What's the Difference Between Cougars, Pumas, and Mountain Lions?