Wherever there's dirt there's bound to be ants, but one particular group is so adept at blending in with the ground that they hold the name "dirt ant" (Basiceros) all to themselves.

Paleontologists have unearthed an ancient dirt ant trapped in 16-million-year-old amber from the Dominican Republic.

Many stratigraphers (scientists who study rock layers) criticize the idea, saying clear-cut evidence for a new epoch simply isn’t there. “When you start naming geologic-time terms, you need to ...