Prehistoric Animals

It was believed that the 120 million-year-old Longipterygidae family's long beaks with sharp teeth at the tip put them in a similar class to modern kingfishers.

The previously unknown dolphin species inhabited the area of today's landlocked mountainous Switzerland 20 million years ago.

The extinct shark is considered to be one of the largest and most powerful predators ever to have lived.

The extinction of the planet's biggest sharks offers fascinating insights into their contemporary apex predators, great whites.

Among the remains of at least seven individuals from a species of Hadrosaur is an individual named Bruno, the most complete dinosaur skeleton found in Italy.

The creature is the earliest known species of a group of sea scorpions called mixopterid and could have been an important predator in the shallow seas of China.

Comparing the Ulughbegasaurus to the ancestor of the T. rex is like comparing a grizzly bear to a coyote, said a researcher who helped identify the huge reptile.

Megalodons lived between 3.6 to 20 million years ago and could reach up to 49 feet in length.

The man was walking along a river when he made the amazing discovery, which experts estimate to be around 84 million years old.

The creature's internal organs, including its teeth and some of its intestines, have been preserved for tens of thousands of years.

Megalodon was the largest shark ever to have lived, potentially growing up to around 60 feet in length.

"Thalattosaurs were among the first groups of land-dwelling reptiles to readapt to life in the ocean," Neil Kelley, an author of the study from Vanderbilt University, said in a statement.

The 0.2-inch-long specimen was identified in amber from the Baltic Sea region in northern Europe.

The latest discovery comes four years after a similar find in the same region of Argentina.

Short-faced kangaroos are an entirely extinct group of marsupial herbivores that arose during the Miocene Epoch—around 23 to 5.3 million years ago—and diversified prolifically during Australia's Ice Age.

These creatures can grow to 800 pounds and 14 feet long.

Ichthyosaurs were large marine reptiles that roamed the seas during the age of the dinosaurs.

The bat's teeth and bones were three times the size of today's average bat.

Behold these marvels of the sea.

Russian authorities found 24 teeth from a prehistoric sea predator that may have been related to the largest ever shark, in the baggage of a man set for China.

These 20 to 25 million-year-old fossilized remains may be of a sea cow species previously unidentified by scientists.

These animals were basically the same, even when T. Rex roamed the Earth.

They are using different approaches to the de-extinction issue—and only one can be first.