In prehistoric times, the Earth was crawling with several giant versions of the animals we know today, including sloths the ...

It was nearly twice the size of an Emperor Penguin, the largest living species. The bird, named Inkayacu paracasensis, lived during the late Eocene period. It had a long, straight beak ...

The giant penguin species known as palaeeudyptes klekowski lived in the Eocene period, over 34 million years ago, and would have been able to hold its breath underwater for up to 40 minutes in ...