When did most of the dinosaurs die, the quick answer is that they went extinct about 66 million years back (MYA).

When did most of the dinosaurs die, the quick answer is that they went extinct about 66 million years back (MYA). Geochronologists establish accurate dates for occasions that happened eons ago But no one can check that date by consulting a past history b k or glancing at a calendar or even a clock. So just how how is it …