By the late 20th century, the Florida panther was down to just 20 to 30 individuals. Now, there are about 200 of them… Or are there? What if preserving an animal means changing it?

66 million years ago a giant space rock crashed into our planet and killed the dinosaurs. In the span of just four decades, we’ve gone from not knowing there was a space rock at all to knowing exactly where that planet-killer came from.

Experience the beauty lost to time and human influence in our countdown of stunning natural wonders that have vanished from our world.

Colossal Biosciences' project to revive the once-extinct dire wolf could also prevent existing but endangered animals from slipping into extinction themselves.

In the southern part of Mexico City lies Xochimilco, a maze of canals filled with boats, music, food and tourists. But Xochimilco is more than that. It’s one of the last remnants of the interconnected lakes that once surrounded Tenochtitlan, the ancient c...

In 1938 a woman in South Africa makes a strange discovery of an unknown 5-foot-long fish. Coelacanths are an ancient group of lobe-finned fish in the class Actinistia. As sarcopterygians, they are more closely related to lungfish and tetrapods than to ra...

Sir David Attenborough explores London’s Natural History Museum and meets some of the most extraordinary creatures from the past. Advanced CGI shows Attenborough face-to-face with a saber-toothed tiger, a giant eagle, and a colossal snake. "Museum Alive w...

Sir David Attenborough comes face-to-face with the dodo - the first animal driven to extinction by humans.

Permafrost has preserved some of the most remarkable remnants of the past, including woolly mammoths, steppe bison, and cave lions.

The Wrangel Island mammoths would end up being the final survivors of a once-widespread genus. In their final years, after having thrived in many parts of the world for millions of years, the very last mammoths that ever lived experienced what’s known as...

As the last survivor of his species, Lonesome George became a worldwide icon of conservation decades before he died from natural causes in the Galapagos in 2012.

Thylacines — marsupials known as Tasmanian tigers — were declared extinct decades ago, but efforts to find one in the wild are thriving. Scientists are also working to bring back the species.

Many of the world’s most beloved frogs and amphibians are headed for extinction, but inside “The Ark” in Panama, some of those threatened species are given a fighting chance.

Since Hawaii is an island the introduction of new species can completely decimate an entire ecosystem. Which is exactly what happened when William Herbert Purvis introduced the mongoose to the islands. Contributing to Hawaii becoming the extinction capita...

For more than 10 million years, Megalodon was at the top of its game as the oceans’ apex predator...until 2.6 million years ago, when it went extinct. So, what happened to the largest shark in history?