How The Dinosaurs Disapear? Scientists made observations at the crater opened by the meteorite in the Gulf of Mexico, which is believed to have caused the dinosaur extinction to disappear about 66 million years ago. An international team was formed to identify the period of extinction of the dinosaurs. The researchers, dating from the rocks and ashes dating back to the 11th millennium BC, revealed that dinosaurs were consumed approximately 66 million 38 thousand years ago. Scientists, describing that the 2214-kilometer-wide sky rock has crashed into the earth and then become completely dusty, spreading to the atmosphere, suggesting that a certain fraction could be re-condensed into the air and back down to the center of action in small lumps. The samples are still being tested in 4 separate laboratories.