World 6 · Feathers, Birds and Extinction · 11 min · PRO

Feathers before flight

Fossils with filaments, vanes and quill knobs

PRO · Dinosaur Dig

World 6: Feathers, Birds and Extinction is part of PRO

The first world of Dinosaur Dig is free. PRO opens the other 24 lessons in 6 worlds — simulations, quizzes and all.

Archaeopteryx and the dinosaur–bird tree
The asteroid at the K–Pg boundary
Survivors and what came next
Relative dating and index fossils
Half-life: the atomic clock

PRO includes

All 60 labs — every world, every lesson
Practice exams and certificates

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