The Ultimate Book of Dinosaurs
By Mat Edwards and Claudia Martin
()
About this ebook
Come face-to-face with the most fearsome creatures ever to walk the Earth, in this definitive children's guide to dinosaurs.
From Apatosaurus to Zuniceratops, discover the lifestyles of real, living and breathing dinosaurs-their pack behaviors and hunting strategies; their nurturing and savage sides; their instincts and intelligence.
Revel in the majesty of migrating sauropods, and marvel at the might of the most powerful hunters ever to walk the Earth. Then take to skies and seas, soaring with pterosaurs and diving with ichtyosaurs.
Beautifully realized, photo-realistic artworks bring to life the prehistoric environments of the Triassic, Cretaceous, Jurassic.
It's the closest you'll come to meeting a real dinosaur! A fantastic book for children aged 8+.
ABOUT THE SERIES: In order to create reference books deserving of the title 'Ultimate', we have brought together world-class children's authors, expert consultants, sought-after illustrators, and exceptional international photographers. Every title is meticulously researched, and presents information with clarity, passion, and intelligence.
Mat Edwards
UK-based illustrator Mat Edwards has been drawing for as long as he can remember. He began his career working in art studios, becoming a freelance artist in 1992, and carved a flourishing career that continues right up to today.
Read more from Mat Edwards
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The Ultimate Book of Dinosaurs - Mat Edwards
Chapter 1: Rise and Fall of Dinosaurs
BIRTH OF THE EARTH
Around 4.5 billion years ago, Earth formed in a cloud of gas and dust that was spinning around the young Sun. Tiny, simple living things appeared in Earth’s oceans around 3.5 billion years ago. It was only 0.23 billion years ago that the first dinosaurs walked the Earth.
Along with the other planets in the Solar System, Earth was born in the gas and dust left over from the formation of the Sun. Gravity began to pull the gas and dust into clumps. The third large clump from the Sun became Earth. As the material crashed together, it gave out an enormous amount of heat, warming the new Earth to around 5,000°C (9,000°F).
Heavy metals, mostly iron and nickel, sank to form the core of our planet, around 6,970 km (4,330 miles) across. Lighter materials moved toward the surface, forming molten rock.
For the first 500 million years, Earth was baking hot and surrounded by poisonous gases. Slowly, Earth cooled enough for its outer layer of rock to harden. Water started to cover much of Earth’s surface, forming oceans, while the atmosphere we breathe today took shape. Now the conditions were right for life to thrive.
The dinosaur Liliensternus lived around 0.23 billion years ago, around 3.27 billion years after the first living things evolved.
Evolution
As Earth itself has changed, so have the animals and plants that live on it. Over millions of years, living things change, or evolve, developing new features that help them survive. Natural disasters, causing sudden changes in temperature or sea level, can also drive some living things to extinction.
All living things evolved from life forms called archaea, which are just one tiny, simple cell. Dinosaurs were made of trillions of cells.
Around 0.6 billion years ago, the oceans were home to some of the earliest many-celled creatures.
FOCUS ON:
CHANGING PLANET
Earth has not always looked as it does today. Over the last 4.5 billion years, the shapes of the continents, the climate, and the depth of the oceans have been through constant, but extremely slow, changes. Many of these changes have been caused by the movement of the plates of rock that form Earth’s surface.
Scientists divide the history of Earth into periods of time called—from longest to shortest—eons (or aeons), eras, periods, and epochs. The beginnings and ends of these time periods are marked by major events, such as big steps forward in evolution or catastrophes that caused widespread extinctions. Scientists have learned about these events by studying rocks and fossils. The dinosaurs evolved during the Triassic Period, began to dominate the land during the Jurassic Period, and died out at the end of the Cretaceous Period.
The Earth’s surface is formed by giant plates of solid rock, called tectonic plates, which fit together a little like jigsaw pieces. Over time, the flow of hot rock beneath these plates has moved them across Earth’s surface. This has changed the shapes of continents, as well as pushed up mountains and caused volcanoes and earthquakes where the edges of plates press into each other. Large volcanic eruptions can change Earth’s climate, making the air warmer or cooler and lowering or raising the level of the sea.
A high number of volcanic eruptions released lots of carbon dioxide gas, which traps heat around Earth.
Triassic Period: 252–201 million years ago
Movement of Earth’s plates had formed one landmass, a supercontinent called Pangea. The climate was so warm there was no ice at the Poles.
Jurassic Period: 201–145 million years ago
Pangea had split in two, creating two main landmasses.
Cretaceous Period: 145–66 million years ago
As the landmasses broke into smaller regions, dinosaurs evolved to have greater differences in different environments.
Today
For the last 5 million years, the continents have looked much as they do today.
Cretaceous swamp
During the warm Period, shallow seas covered much of the continents.
LIFE BEGINS
Life began in the oceans and remained there for around 2 billion years. During this time, life forms evolved from single-celled archaea to many-celled animals and plants. Eventually, some animals developed backbones, becoming the first vertebrates. Later still, some vertebrates grew four legs, making them the ancestors of dinosaurs—and humans.
The earliest living things were not animals: they were tiny, basic life forms called micro-organisms. The earliest known animals evolved around 665 million years ago. Animals can move, eat other living things, and need oxygen to survive. The earliest animals were soft bodied, without shells or backbones. They absorbed oxygen from the water. These animals were the ancestors of today’s invertebrates (animals without backbones), such as jellyfish.
Around 540 million years ago, some animals started to grow shells. These may have been useful for protection or for weighting down the animal so it did not drift in the current. Some of these early shelled creatures were the ancestors of today’s snails and crabs.
The earliest vertebrates evolved around 520 million years ago. These fish-like creatures sucked up food rather than biting it, as they did not have jaws. After another 60 million years, the first animals with jaws evolved Among them were shark-like fish. The first four-legged animals, known as tetrapods, evolved from bony fish around 367 million years ago.
Ammonites, which were invertebrates with spiral shells, lived in the oceans between 240 and 66 million years ago.
Tetrapods
Early tetrapods lived mostly in shallow water, but their four legs enabled them to walk on land. Like their fish ancestors, they had body parts called gills for taking oxygen from the water. However, they had also evolved lungs for breathing air. Amphibians were among the earliest tetrapods. Modern amphibians include frogs and salamanders, which lay eggs in water and usually spend part of their life in water and part on land. Later tetrapods—the reptiles, birds, and mammals—no longer had gills, relying on lungs alone to breathe air. Unlike their reptile ancestors, mammals also developed hair and started to