Everyone in town loves Edwina the dinosaur except one little boy who is determined to prove to everyone, including Edwina, that dinosaurs are extinct.

Passenger pigeon hatchlings, thought to be extinct, are discovered in Grandmother's room after she departs on a voyage to Greenland.

"Could extinct species like mammoths and passenger pigeons be brought back to life? The science says yes. In [this book], Beth Shapiro, evolutionary biologist and pioneer in 'ancient DNA' research, walks readers through the astonishing and controversial process of de-extinction. From deciding which species should be restored, to sequencing their genomes, to anticipating how revived populations might be overseen in the wild, Shapiro vividly explores...