Why does ice float in water, instead of sinking to the bottom? It has to do with water's density and molecular structure.
Do these tundra-inhabiting rodents actually jump to their deaths as depicted in a 1958 wildlife documentary?
Hydrogen is not a metal on Earth, but scientists keep trying to create metallic hydrogen under high pressure to unlock a new superconductor.
Life's Little Mysteries Poop eating is a natural behavior in dogs; although it may disgust humans, it usually poses no threat to your canine's health.
Coughing is helpful during sickness to protect the lungs from infection. But lasting inflammation may irritate the nerve reflexes that cause coughing.
Birds do produce urine, but it doesn't come out the same way it does in humans. How birds pee may be an evolutionary adaptation that benefits flight.