National Geographic estimates there are between 50 billion and 430 billion birds populating the planet, outnumbering humans by up to approximately 50 times. Spread across 9,700 species, according to ...

Bats, rodents, hedgehogs, and shrews are mammals among the orders that are predicted to have the most undescribed mammals. (Pictured: a bicolored shrew) Werner Korschinsky via Wikimedia Commons under ...

Kangaroos are iconic Australian animals who have long been used as a symbol within the country to represent moving forward. All four species are herbivores who roam around grazing on grass and leaves.

Mammals only have one life to live, but the length of that life varies greatly. While some shrews shuffle off this mortal coil in less than 14 months, bowhead whales can swim in Arctic waters for more ...