NOVA | PBS

Defining Intelligence: Nicholas Humphrey

Theoretical psychologist Nicholas Humphrey explains the concept of social intelligence.

Defining Intelligence: Rodney Brooks

Roboticist Rodney Brooks describes what "intelligence" means in his field.

NOVA Minute: The Interaction of Species

Naturalist E.O. Wilson thinks that even today, we're a long ...

Naturalist E.O. Wilson thinks that even today, we're a long way from fully understanding how ecosystems work.

Toward a Smart Electric Grid

Energy expert Vijay Vaitheesaran thinks the U.S. needs to upgrade ...

Energy expert Vijay Vaitheesaran thinks the U.S. needs to upgrade to a "smart" electric grid.

The Risks of Automated Flight

Aviation safety expert Bill Voss thinks airlines should change the ...

Aviation safety expert Bill Voss thinks airlines should change the way they train pilots

When Lightning Strikes Aircraft

Just how dangerous is lightning to an aircraft in flight?

Smart Birds

Some parrots can talk—but can they really understand what they're ...

Some parrots can talk—but can they really understand what they're saying?

The Dangers of Nanotech

Nanomaterials are used in consumer goods from cell phones to ...

Nanomaterials are used in consumer goods from cell phones to sunscreen. But how safe are they?

Suspended Animation

Cell biologist Mark Roth says that suspended animation isn't just ...

Cell biologist Mark Roth says that suspended animation isn't just science fiction.

Solar Sails

NASA engineer Dean Alhorn thinks that the next generation of ...

NASA engineer Dean Alhorn thinks that the next generation of spacecraft will be propelled not by rockets, but by light.