Martian dust soil is magnetic. The only region on Earth with magnetic soil is in Africa.
Among the treasures the ancient Egyptians loaded into Tutankhamen's tomb for his use in the afterlife was a recipe for beer.
70 million years ago, dinosaurs had adapted to live in the frozen north above the arctic circle in what is now Alaska.
Scientists estimate that some dinosaurs migrated 2000 miles each spring and fall - farther than any migrating land animals today.
Humans, chimpanzees, and some gorillas are the only animals who can recognize themselves in a mirror.