Question

The Cenozoic Era has the most divisions yet it takes up the least amount of time on the Geological time scale. Why is this?

Answer 1

The Cenozoic Era is the era we live now, these effect humans everyday and the advancements in every field have happened recently.

Explanation:

Humans have not been around for long considering the length of Earth's history.
Most of our advancements in culture, technology, and way of life have happened during the Cenozoic Era