Question

What evidence supports the assumption that a large number of living species disappeared about 65 million years ago due to a catastrophic impact?

Answer 1

The primary evidence that supports the theory that an asteroid strike approximately 65 million years ago caused a mass extinction is a thin layer of clay containing iridium, an element that is common in space, but not on earth being of that age and found in many different places in the world, indicating a large-scale event..