Extras
A team of scientists and filmmakers explore the Antarctic waters to learn more about killer whales.
Fossils reveal how birds survived the killer asteroid and became today’s only living dinosaurs.
The change of seasons brings turmoil and tough choices to the three big cat families.
Female leopards are known to hunt the cubs of others -- even their own siblings.
Lions may not have the cheetah's speed or the leopard's forest cover but they have other tricks.
Baboons are the eyes and ears of the woodlands.
This mother cheetah's name Phefo means 'wind,' and you'll know why when you see her run.
Lion, leopard and cheetah parents attempt to co-exist and raise their cubs in Botswana.
The lionesses synchronized their pregnancies, which may have seemed like a good idea at the time.
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NOVA Season 52
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NOVA Season 27
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NOVA Season 23
Fossils reveal how birds survived the killer asteroid and became today’s only living dinosaurs.
Mysterious bodies are found under one of the world’s most famous cathedrals.
From electric flight to artificial noses, engineers are finding new ways to preserve our planet.
Follow the race to build a world-class airport on the site of one of America’s busiest flying hubs.
Humans are born to roam. See how engineers are inventing new ways to explore and extend our range.
Is engineering humanity’s superpower? See how we can amplify our natural abilities in amazing ways.
Dive into the universe at the tiniest – and weirdest – of scales.
Meet the surprising, oddball worlds moving around our solar system.
Visit strange, frozen worlds to discover the bizarre ice that forms beyond Earth.