The finding adds new evidence to the debate of whether they were cold or warm-blooded.
The fossil of the largest marsupial that ever roamed Australia could offer insight into climate change.
The new animals include 580 invertebrates, 134 amphibians, two birds, 71 fish , 43 reptiles and 12 mammals.
According to multiple media reports, a 55-foot-long marine animal recently washed up dead on a beach at Guangdong, China. What's this species that beach goers are calling a "sea monster"?
The first known art object from America is a 13,000-year-old carving of a mammoth on mammoth bone.
The discoveries on Luzon Island increase the number of native mammals known from that island from 42 to 49.
A rare genetic mutation causes mammals -- and now fish -- to develop muscles that are twice the normal size.
The discovery of radioactive cesium in minke whales off Japan seems unlikely to boost the country's whale meat market.
In light of a spate of rabies attacks, take a closer look at the disease, its risks and how you can avoid it.
Dogs are so in tune with us that they can read our minds, according to a new study.