No longer.In the early 1980s, scientists were able to show that terrestrial mineral and crystal deposits 65 million years old were similar to those found routinely in lunar ejecta.

• 不久，在八十年代初，科学家们能够证明六千五百万年前的地球矿物和晶体沉积物类似于同期在月球发现喷发物。