The evolution of mammals from non-mammals, like the evolution of all other animal groups, has been, and will always be, problematic. English paleontologist Michael Benton stated, “The origin of the Placentalia, the crown group including modern placental mammals and their ancestors, is a much-discussed question.”1
Placental mammals are a group called the Eutheria, which “probably arose during the Creta… More…
Source: icr.org
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