After a farmer in northeastern China picked a fossilized flying lizard out of the ground last year and sold it to a museum, paleontologists quickly noticed a broken wing - and an egg nestled next to the animal's tail. The scientists dubbed the spectacular specimen "Mrs. T" - a contraction of "Mrs. Pterodactyl" - and are announcing her as the first prehistoric flier to be assigned a sex.

She provides vital clues to the mating habits of the creatures that ruled the skies for 150 million years before birds appeared.