Fido Facts:Dogs as a distinct species date back 12,000 to 14,000 years ago, during the last Ice Age. Dogs and humans made the transition together from nomadic hunting and gathering to settled...
Why to things float?For something to float, it must be less dense than the material in which it floats.Steam, which is less dense than air, rises (or floats) in the air. This is why cloads float;...
