Paleontologist Thaís Pansani standing in front of a reconstructed giant ground sloth skeleton at the Smithsonian ... Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons ...

one set of tracks shows "a giant ground sloth going along on four feet" when it encounters the footprints of a small human who's recently dashed by. The huge animal "stops and rears up on hind ...

one set of tracks shows “a giant ground sloth going along on four feet” when it encounters the footprints of a small human who’s recently dashed by. The huge animal “stops and rears up on ...