Sometimes it nice to just kick back and take it slow. Really slow. So what if evolution had the same mindset, and decided to ...
Researchers in Costa Rica have uncovered ancient mastodon and giant sloth fossils, shedding light on the prehistoric giants that once roamed the region.
Researchers in Costa Rica have unearthed fossils from a mastodon and a giant sloth that lived as many as 40,000 years ago, officials announced Friday, calling it the biggest such find here in decades.