Emily Graslie cruises into the Cretaceous, where astonishing creatures like T. rex dominated the planet. But what happened to these tremendous animals? And how did other life forms survive an apocalyptic asteroid that crashed into Earth 66 million years ago?
As she drives closer to the present day, Emily Graslie discovers surprising truths written in the fossil record. Meanwhile, the scientists studying our planet's past are revealing clues about its future.
