In the Pacific Northwest, a Quetzalcoatlus spots an unguarded T. rex nest and consumes several young babies.
The father T. Rex is hunting when his acute sense of smell alerts him to the intruder and he runs back to the nest.
The Quetzalcoatlus' huge wings hamper its escape in the forest as the T. rex bites its foot.
A female lays a clutch of eggs as a large asteroid hits nearby, sending debris into the air.
In Mongolia, a herd of Charonosaurus reside by a watering hole, where the females lay their eggs.
A mated pair of Quetzalcoatlus try to fly away but are caught in the shower of debris, which burns holes in their wings.
Large dinosaurs, including a T. rex, a group of Triceratops, and an Ankylosaurus flee while smaller animals hide underground.
Forty-five minutes after impact, the ejecta cloud rolls into Mongolia from the east, increasing the temperature by several degrees every second until it reaches 300 °F (150 °C).
The remaining female Quetzalcoatlus lands and eats a stranded fish, just as the 300-foot (90 m) wave races towards shore.
Crocodilians, amphibians and fish survived under water, and birds flew or swam away from disasters.
As the ejecta cloud cleared and sunlight returned to the Earth, plants, especially ferns, began to flourish once more.
Over the 65 million years after the dinosaurs disappeared, mammals grew to dominate the planet, leading to the evolution of humans.