Some extinct animals are neither dinosaur nor mammal. Learn about trilobites and other extinct life in this section.
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On Sept. 7, 1936, Benjamin, the last known Tasmanian tiger, died in captivity at the Hobart Zoo in Tasmania, Australia. But there are those who believe this extinct species still walks the Earth.
By Wendy Bowman
Lonesome George, the last of his species of tortoises, died in the Galapagos in 2012. But scientists have now finished analyzing his DNA and found some fascinating clues about giant tortoise longevity.
When we think venom, we think cobras and vipers. But Euchambersia was a reptile, a mammalian ancestor, and venomous, according to new fossil analysis.
This insect's appearance and characteristics are so unusual, it has received its own scientific order.
By Alia Hoyt
A small island off the coast of Alaska supported a mammoth population until sea levels rose and fresh water sources shrank.
The mysterious aquatic creature lived 300 million years ago, and its fossils have stymied scientists for more than 50 years. New research solves some of the mystery.
More than 100 years after the last quagga died, scientists in South Africa are using selective breeding to bring it back.
Learn more about the top 10 most mysterious creatures to disappear from the earth.
Although it may be long extinct, this quirky bird continues to amaze scientist. The latest discovery? An awesome “musket ball” weapon located on the tip of its wing structure. Could our world once again include this big, old flightless pigeon?