A fossilized leaf of Orontium wolfei
A fossilized leaf of Orontium wolfei
A fossil of Titanomyrma gigantea
A fossil of Titanomyrma gigantea
  • ... that the discovery of the fossil giant ant Titanomyrma (pictured with a hummingbird) in Wyoming indicates that warmth-loving fauna spread through the north between Europe and America during hot spells in the Eocene?