Scientists have identified three new species of giant kangaroo that lived from 5 million to 40,000 years ago, one of which is around double the size of the biggest kangaroos alive today.

Three new species of extinct kangaroo have been identified by Australian researchers — including one that would have dwarfed even the largest Red Kangaroo. The findings, published in the ...

Mammals are among the most adaptable animals on the planet. They are found on every continent and in every ocean, and range in size from tiny bumblebee bats to enormous blue whales. One reason for ...