But if we act now, conservation efforts could save "billions of years of unique evolutionary history," scientists say.
Rabbits have evolved numerous beneficial adaptations and behaviors over time, which have helped them to survive the threat of predators.
Elephant skin is covered in an intricate network of minuscule crevices that retain water and mud, providing a number of benefits.
Discovery that octopuses react in same way to drug as humans indicates there is an ancient evolutionary pathway promoting social behavior.
Humans were butchering giant animals on the island more than 10,000 years ago.
Among the earliest fossils, one marine creature has long baffled scientists.
Tree shrews are a small mammal species native to southeast Asia.
The Gaia hypothesis proposes that life, through its interactions with the Earth's crust, oceans, and atmosphere, produced a stabilising effect which has enabled it to survive under conditions which would have wiped it out on non-regulating planets.
The ancient skull fragment is "a unique opportunity to learn more about the biology and diversity of our ancestors and their relatives and, ultimately, about their evolution."
"This was one strange-looking fish."
The organisms have been named after former President Barack Obama and renowned British naturalist Sir David Attenborough.
Without amber, it's unlikely that scientists would have ever discovered this long-extinct creature.
This genetic variant may help explain different health disparities between those of African and European decent.
The findings could help to shine a light on the evolutionary history of mammals.
The "second brain" may actually have been the "first brain."
This was from long before the dinosaurs.
The asteroid and its after-effects ushered in a great extinction event that wiped out some three quarters of all plant and animal life, including dinosaurs and most birds.