In-depth research of the fossil record has shown a Cretaceous origin for placental mammals, which include humans, dogs, and bats, indicating they co-existed with dinosaurs for a short period before the dinosaurs became extinct.
Washington D.C. [USA], Jul 4 (ANI): Turns out, the global catastrophe that delivered the coup de grace to the dinosaurs was actually good news for frogs as they took a leap forward to survival after the mass extinction.