Earth Day: By the numbers 00:42. Earth is home to millions of discovered species of plants and animals with many more yet to be known. They all play vital roles in each other, their ecosystems ...

The Javan rhino is the “most threatened of the five rhino species” when it comes to poaching, according to the WWF. Only about 70 reside in the Ujung Kulon National Park in Java, Indonesia.

In the 1940s, Ernst Mayr, a German ornithologist, tried solving this problem with a new definition of species based on how animals breed. If two animals couldn’t breed with each other, Mayr ...

Officially, a "species" is the bottom of the taxonomic ranking system that starts with domain and works its way down through kingdom, phylum, class, order, family and, finally, genus and species.

When it comes to what the public can do to help support these species, Leddick said the list is incredibly long. "People can do so much," he said. "But you don't always see the direct impact, even ...

Over 2000 species are identified, of course! Tucked in this lush landscape where the Amazon basin meets the Andes mountains, were 27 species of animals previously unknown to science.

The International Union for the Conservation of Nature reports 35% of all shark species are threatened with extinction. That number has grown nearly 50% in a decade’s time.