Greek philosopher Archimedes realized that anything that displaces its own weight in water will float. Learn more on this Moment of Science.
How does tinfoil float? Find out on this Moment of Science.
Why do corpses float? Find out on this Moment of Science.
The difference in pain is due to the way each insect obtains blood. Mosquitoes have mouth parts that are highly modified for piercing; they have a sharp proboscis, a prominent tube-like part that extends from their head and houses organs known as stylets which work like hypodermic needles to penetrate the skin and suck up your blood.