Megafauna paleoburrows in Brazil, discovered by geologists like Amilcar Adamy and Heinrich Frank, are extensive tunnels ...

When Adamy reached there, he knew that the cave was too deliberate to be a result ... They have identified the likely creators as giant ground sloths and giant armadillos. Representative Image ...

Natural Trap Cave near Lovell is one of the best Ice Age fossil sites in the world, but its lack of saber-toothed cats and giant ground sloths ...