Otzi, a 5,000-year-old mummy, has 61 tattoos arranged in 19 groups across his body.

Crows remembered the face of a person they considered a threat—even across generations.

To understand gravity, Einstein had to rethink space and time as a single connected fabric. He showed that mass bends this fabric, guiding how everything moves. NOVA is available to stream on pbs ...

The faster you move, the stranger time becomes. By imagining how light travels to two people moving at different speeds, Einstein showed that time isn’t absolute. His thought experiment revealed ...

NEW NOVA SERIES “HUMAN,” A BBC STUDIOS SCIENCE UNIT PRODUCTION WITH NOVA AND GBH FOR PBS AND THE BBC, INVESTIGATES THE ORIGIN OF OUR SPECIES ...