Meet 10 largest land creatures to ever roam the planet.

In the case of domestic cats, dogs and many other domesticated species, intentional and unintentional selection by humans ...

By combining data on all known bird species, this tree is the most impressive snapshot yet of one of Earth’s most ...

The number of people who die from rabies each year in the U.S. has decreased dramatically since 1960, according to the ...

Analysis of the fossil suggests that the only two egg-laying mammals, platypuses and land-based echidnas, both descended from ...