Q

Tail held stiffly for balance

Tail held stiffly for balance

Microraptor

Thick hair covered body

Were there any mammals?

| A Mammals evolved around the same time as the dinosaurs, so the two animal groups coexisted. But mammals were unable to compete with dinosaurs in size or ferocity and throughout the Mesozoic Era most were small, shrewlike animals. Many, like this Eozostrodon, hunted at night to avoid meat-eating dinosaurs. They fed on insects and other small animals.

Which was the weirdest A dinosaur?

During the 1940s, paleontologists on fossil hunts in Mongolia made some unusual finds—giant claws over 3 ft (1 m) long, as well as parts of limbs. Some time later a skeleton was pieced together. What it revealed was a dinosaur like no other: two-legged, 36 ft (11 m) tall, with 8 ft- (2.5 m-) long arms ending in enormous claws, and probably covered with downy feathers. The weird find was named Therizinosaurus, meaning "scythe lizard."

Microraptor i

More Facts

The birdlike Microraptor is one of the smallest dinosaurs yet discovered — it was just 30 in (77 cm) long. The remains were found in a lake bed in China in 2000.

In 1993, the fox-sized Eocursor was discovered in South Africa. Dating from the Triassic Period, it is one of the earliest known ornithischian dinosaurs.

The earliest dinosaurs looked like short-headed crocodiles, but some later ones looked more like birds.

■ A typical dinosaur was about the same weight as a hippopotamus.

Covering of feathers

Covering of feathers

How was a dinosaur born?

Teeth and claws were not yet developed enough for the hatched baby to catch its own food

Teeth and claws were not yet developed enough for the hatched baby to catch its own food

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