The Neogene Period (23.03–2.59 Ma) is in the Cenozoic Era, occurring after the Paleogene Period, and before the Quaternary Period.
23.03–2.59 Ma
Mammals and birds diversify
Human ancestors begin to feed on grasses and sedges (Wynn et al. 2013)
North and South America connect
Climates cooled during the Neogene
Continental glaciations in the Quaternary