Land Mammals

After years of failed attempts, scientists have finally succeeded in snapping images of an extremely rare, enormous rat that is so big it can reportedly chew through coconuts on the Solomon Islands.

Serotine bats that have penises seven times longer and wider than their female counterparts' vaginas are the first known mammals to engage in non-penetrative sex.

Why are dogs, especially puppies, in endless pursuit of their tails?

Do these tundra-inhabiting rodents actually jump to their deaths as depicted in a 1958 wildlife documentary?

Obesity is wreaking havoc on cats' digestive systems, causing "significant changes" in their gut microbial compositions and giving them highly acidic poop.

In this interview, elephant expert Ross MacPhee explains how the giant animals' tusks record every week of their lives and why their noses are so remarkable.

A new show on "The Secret World of Elephants" at the American Museum of Natural History in New York City dishes on the evolution and remarkable lives of these huge (and sometimes dwarf) pachyderms.

Elephants in Kenya's Amboseli National Park appear to call to each other with individual names using low, complex "rumbles," a study has found.

Scientists have discovered that chimps living in Côte d'Ivoire carry out surveillance on each other to avoid or incite conflict — much like in human military operations.

Japanese officials found the body of a missing student alongside the corpse of a brown bear that likely killed him. The bear is also suspected of attacking several other people in the area.