Cuba's secret

时间:2019-03-08 02:09:14166网络整理admin

A ROCK layer in western Cuba contains the best evidence of an asteroid impact that may have killed the dinosaurs. The 300-metre thick deposit is the thickest known from the collision in the Gulf of Mexico, said S. Kiyokawa of the National Science Museum in Tokyo at the Lunar and Planetary Science Conference in Houston last week. American geologists suggested looking in Cuba as long ago as 1990,