Mexican scientists have discovered the fossilised remains of a previously unknown species of giant sloth that lived 10,000 years ago.
This sloth was found at the bottom of a sinkhole.
The Pleistocene-era remains were found in 2010, but were so deep inside the water-filled sinkhole that researchers were only gradually able to piece together what they were.
The skeleton is nearly complete, leading scientists to believe the sloth fell into the sinkhole when it was dry or had only a little water at the bottom.
They have named the new species Xibalbaonyx oviceps.
An initial analysis suggests the sloth lived between 10,647 and 10,305 years ago.
This marks an era when giant creatures of all kinds roamed the earth.
