Dinosaurs Classes for Teens

Sort out the world's energy sources: which ones nature keeps refilling (solar, wind, hydro) and which limited fossil fuels we're burning — and why the difference matters.

Follow a carbon atom as it loops from the air into plants, through animals, and back again, and see how burning fossil fuels tips the balance.

Follow the clues, fossils, shared bones, matching DNA, and evolution caught in the act, that together make the case for how life changes over time.

Paleontologists are detectives of deep time. From a single tooth, a footprint, or a scrap of fossil dung, they rebuild whole vanished worlds. Learn how scientists piece together what ancient landscapes, animals, and food webs were really like.

How do scientists know a rock is a billion years old? Inside every rock sits a hidden clock made of decaying atoms. Learn how half-lives let geologists read the true age of rocks, fossils, and the Earth itself.

The sparrow at your window is a living dinosaur. Follow the fossils that show how feathers, folding wrists, and hollow bones turned small meat-eating dinosaurs into the birds of today.

Five times in Earth's long history, life was nearly wiped out. Meet the Big Five mass extinctions, from the icy end-Ordovician to the asteroid that ended the dinosaurs, and see how the planet recovered each time.