Investigate the Human Cell

The human body is actually a collection of trillions of individual living cells. Each cell has a complete copy of your DNA, and together your cells perform all the functions that make you tick, head to toe. Now you can explore this amazing microscopic world for free right in your browser.

Before the Dinosaurs: Coal-Age Monsters

T. rex and velociraptors get all the glory. But millions of years before those awesome theropods ruled the earth, a stranger clan of reptiles and amphibians dominated the planet. Weirdly wonderful creatures like Diploceraspis, the boomerang-headed salamander from the Permian period. Diploceraspis, like it's evolutionary cousin, Diplocaulus, was a lepospondyl amphibian. They grew to half … Continue reading Before the Dinosaurs: Coal-Age Monsters