Historical Geology Understanding Our Planet\'s Past

ensuring the continuation of the species.The parents might have brought food to their young and regurgitated seeds and berries a ...

The period between the end of the Triassic and the beginning of the Jurassic was one of the most exciting times in the history o ...

apparently struck Earth with the explosive force of 100 trillion tons of dyna- mite, turning the planet into an inhospitable wor ...

tion lived in a narrow margin near the equator. Corals declined in the late Paleozoic and were replaced by sponges and algae whe ...

THE NEW RED SANDSTONE The Triassic witnessed the complete retreat of marine waters from the land as the continents continued to ...

The mountain belts of the Cordilleran of North America, the Andean of South America, and the Tethyan of Africa-Eurasia contained ...

events, with major phases generally lasting less than 3 million years. These large eruptions created a series of overlapping lav ...

huddled together into a single landmass named Pangaea. Within a short span of a few million years, black basalt erupted along a ...

T his chapter examines the creatures that took flight and covers the largest animals ever to inhabit Earth during the Jurassic p ...

Free ebooks ==> http://www.Ebook777.com scarcely noticed. The first flight-worthy birds appeared and shared the skies with fl ...

instead descended from bipedaled, meat-eating dinosaurs known as theropods, from Greek meaning “fierce foot.” Indeed, birds are ...

Birds are warm-blooded to obtain the maximum metabolic efficiency needed for sustained flight but have retained the reptilian mo ...

forbearers might have flapped their wings to increase running speed while escaping predators, thereby obtaining flight purely by ...

similar to a modern hang glider and weighed about as much as the human pilot. Many pterosaurs had tall crests on their skulls, w ...

The pterosaur might have achieved flight by jumping off cliffs and riding the updrafts, by climbing trees and diving into the wi ...

the Colorado Plateau region, has yielded some of the largest dinosaur fossils. Many of the best specimens are displayed at Dinos ...

same family of dinosaurs as the brontosaurs. Others, such as Tyrannosaurus rex, perhaps the fiercest land carnivore of all time, ...

clutch was probably a communal nest similar to that used by ostriches, into which hens deposit their eggs and take turns incubat ...

Among the largest dinosaur species were the apathosaurs and bra- chiosaurs, which lived around 100 million years ago. Paralitita ...

Free ebooks ==> http://www.Ebook777.com pigs, and deer. Reptiles with their continuous growth achieve a measure of eternal yo ...