Placentals in the Mesozoic? Clues from continental drift.

According to Wikipedia:“True placentals may have originated in the Late Cretaceous around 90 MYA, but the earliest undisputed fossils are from the early Paleocene, 66 MYA, following the Cretaceous–Paleogene extinction event.” Unfortunately, Wikipedia also follows the results of genomic testing … Continue reading Placentals in the Mesozoic? Clues from continental drift.