Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history. Learn more about the planet's tumultuous past.
More About the Prehistoric World
Follow the blog from the Spitsbergen Expedition as they unearth "sea monsters″ from the Upper Jurassic Period 150 million years ago.
National Geographic's interactive time line takes you on a 4.5-billion-year-old trip through Earth's history⎯from its Precambrian birth to the birth of Homo sapiens some 190,000 years ago.
The largest animals that ever flew, pterosaurs ruled the Mesozoic skies for 150 million years, flapping and soaring long before the first bird ruffled a single feather.
In the international fossil trade, even priceless specimens have a price tag. Ancient bones can end up in a movie star's mansion as easily as in a museum.
Phenomena: A Science Salon
National Geographic Magazine
Our genes harbor many secrets to a long and healthy life. And now scientists are beginning to uncover them
All the elements found in nature—the different kinds of atoms—were found long ago. To bag a new one these days, and push the frontiers of matter, you have to create it first.
Burn natural gas and it warms your house. But let it leak, from fracked wells or the melting Arctic, and it warms the whole planet.