Mastering Biology HHMI Video Transcript

This is a transcript of the video on the Educator Features page and Student Features page.

The Day the Mesozoic Died

Picture a world of giant reptiles.

Flying pterosaurs with 40 foot wingspans.

While beneath the waves, fierce predators called mosasaurs prowled the seas.

And dinosaurs roamed the land.

For more than 100 million years, creatures like these ruled the planet.

And then... they were gone, lost in the shadows of time.

Their extinction a mystery for the ages.

The Day the Mesozoic Died