The American lion (Panthera atrox) may have roared, while the saber-toothed cat Smilodon fatalis may have produced vocalizations similar to living purring cats but at a lower frequency. Smilodon fatalis. Image credit: Adam Hartstone-Rose. Modern cats belong to one of two groups: either the pantherine ‘big cats,’ including the roaring lions, tigers and jaguars; or Felinae ‘little cats,’ which include purring cats like lynxes, cougars, ocelots...
