Dinosaur Facts for Kids: Unearthing the Prehistoric World
Who doesn't love dinosaurs? From museum visits to Jurassic-themed blockbusters, these prehistoric creatures capture the imagination of kids and adults alike. This article delves into the fascinating world of dinosaurs, offering a collection of incredible facts perfect for young learners and dino enthusiasts.
What We Know About Dinosaurs
Dinosaurs were the superstars of prehistoric times - big, mysterious, and extinct. But there’s a lot more to these ancient creatures than just teeth, bones, tails, or skulls that are unearthed.
The Meaning of "Dinosaur"
The name "dinosaur" was inspired by their size and power. Although it means “terrible lizard,” dinosaurs aren’t lizards-they’re a distinct group of reptiles.
Dinosaur Sizes
Dinosaurs were different sizes. When most people think of dinosaurs, they imagine towering giants like the Tyrannosaurus rex. But in reality, many dinosaurs were smaller than a chicken! Like Compsognathus, they could easily sit on your lap - if they weren’t running away first. Dinosaurs came in a wide range of shapes and sizes. Some dinosaurs were smaller than a chicken. Others weighed as much as 100 tons-more than 10 times as much as the largest elephants.
Where Dinosaurs Lived
Have you ever thought that dinosaurs only lived in jungles? Fossils have been found on every continent, even in places that are icy and cold today. That includes Antarctica. Bones of long-necked sauropods and ankylosaurs have been discovered. During most of the Mesozoic, Earth’s climate was significantly warmer, and polar ice caps likely did not exist. This allowed dinosaurs to inhabit regions near the poles, including Antarctica, which was then covered in forests rather than ice. This global spread proves dinosaurs were incredibly adaptable.
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Color of Dinosaurs
While scientists have believed that dinosaurs were gray, green, or brown, new research has revealed that they were likely more colorful than that! For example, the Sinosauropteryx was a turkey-size dino that was probably orange and white with a striped tail. Dinosaurs did not have any hair. Their skin had a bumpy or pebbly surface. Some scientists believe that dinosaurs were gray or green in color. These colors would have helped the dinosaurs blend in with their surroundings. Other scientists think that dinosaurs were very colorful. Bright colors would have helped males get the attention of females.
Evolution of Dinosaurs into Birds
Over generations and generations, dinosaurs evolved into birds. Yep, you read that right - birds are living dinosaurs. They evolved from a group of two-legged meat-eating dinos called theropods (the same family as the T. rex). That means when you see a pigeon in the park or a chicken at the farm, you’re technically looking at a modern dinosaur. Paleontologists also say that dinosaurs were cousins of lizards, snakes, and crocodiles! Genetic studies show birds like chickens are modern relatives of some meat-eating dinosaurs. During the Mesozoic Era (a period of more than 180 million years that included the Triassic, Jurassic, and Cretaceous periods), a species of non-avian dinosaur evolved into a species of avian dinosaur. This avian dinosaur is the first bird and the forerunner of all birds.
Feathered Dinosaurs
Some dinosaurs had feathers. Not all dinosaurs were scaly-some had feathers and were closely related to birds. The largest known feathered dinosaur was the Yutyrannus huali. This cousin of the T-Rex was 30 feet long and probably relied on its feathers to stay warm. Lots of other dinosaurs had feathers and some dinosaurs used their feathers to fly. Fossils have shown that many species of dinosaurs had feathers. Images of dinosaurs often do not show feathers, but scientists believe that feathers were common in dinosaurs. The feathers do not mean that the dinosaurs could fly, however. The feathers may have been a form of insulation, camouflage, or display. Feathers didn’t start with birds - they began with dinosaurs! Many theropods had feathers long before flight evolved. These feathers may have helped with insulation, display (think dinosaur fashion shows), or even to attract mates. Fossils found in China show clear impressions of feathered dinosaurs like Velociraptor and Anchiornis. Scientists believe feathers were one of the key evolutionary steps that led to birds.
Herbivorous Dinosaurs
Many of the biggest dinosaurs, including the Brachiosaurus and Apatosaurus, were herbivores, or plant-eaters. Many dinosaurs ate only plants. Sauropods and ornithischians like Stegosaurus dined on leaves, ferns, and fruit. Some plant-eating dinosaurs didn’t have grinding teeth. So, what did they do? They swallowed rocks! These stones, called gastroliths, sat in the dinosaur’s stomach and helped crush and grind tough plant matter - much like how birds today use grit to help with digestion.
Dinosaur Speed
Dinosaurs like Ornithomimus could run up to 60 km/h (about 37 mph), which is pretty impressive for a creature without Nikes. But no dinosaur was faster than today’s cheetah, which can hit speeds of 70-75 mph in short bursts. Still, dinosaur speed varied widely. In general, smaller, bipedal theropods and ornithomimosaurs were among the fastest due to their lightweight builds, long legs, and balanced tails. Large theropods like Tyrannosaurus rex were probably slower, limited to walking quickly rather than actual running. Some dinosaurs were speedy sprinters. Ornithomimids (“ostrich-mimic” dinosaurs) may have run up to 40-50 mph.
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Timeline of Dinosaurs
Dinosaurs first appeared around 245 million years ago and dominated Earth until about 66 million years ago. Most Triassic dinosaurs were relatively small predators or herbivores, although some early relatives of sauropods had already grown to impressive sizes of over 9 meters by the Late Triassic. Dinosaurs from the Jurassic period, which lasted approximately from 201 to 145 million years ago, span the Early, Middle, and Late Jurassic epochs and include a diverse group of species. Many famous Jurassic dinosaurs have been discovered in the Morrison Formation of the western United States, which serves as a rich source of fossils for Late Jurassic species. The Jurassic period features a blend of both large herbivores, such as the sauropods, and formidable carnivores, including Allosaurus and Ceratosaurus, which define the era’s iconic dinosaur fauna. For millions of years, new dinosaur species emerged while others went extinct at different times. The earliest known dinosaurs appeared during the Triassic Period (approximately 250 to 200 million ago). Contrary to what many people think, not all dinosaurs lived during the same geological period. Stegosaurus, for example, lived during the Late Jurassic Period, about 150 million years ago. Tyrannosaurus rex lived during the Late Cretaceous Period, about 72 million years ago. Stegosaurus was extinct for 66 million years before Tyrannosaurus walked on Earth.
The Triassic Period
Triassic Period (252 - 201 million years ago): This was the dawn of the dinosaurs!
Dinosaur Fossils
Because dinosaurs are extinct (except for birds), scientists rely on fossils - bones, teeth, footprints, and even poop - to learn about them. Each fossil is like a time machine, giving us clues about what dinosaurs looked like, how they moved, and what they ate. For example, sharp, serrated teeth suggest a meat-eating diet, while flat grinding teeth show a love for plants. Some fossils even show signs of feathers! Everything we know about non-avian dinosaurs is based on fossils, which include bones, teeth, footprints, tracks, eggs, and skin impressions. For centuries, people throughout the world have discovered amazing fossilized bones and footprints. Early finds inspired legends and fairy tales, as people imagined that these bones belonged to giants or huge monsters. Fossils have been discovered in deserts, mountains-even ice. Paleontologists are like detectives who examine the evidence that extinct animals left behind. Those clues to what dinosaurs were like are found in fossils-the ancient remains of an organism, such as teeth, bone, or shell-or evidence of animal activity, such as footprints and trackways. Paleontologists looking for dinosaur fossils begin their work by surveying areas to find sedimentary rock from the Mesozoic era. Finding the right spot takes experience and a keen eye. From an individual footprint, scientists can estimate the height of the dinosaur that made it. A rough estimate of leg length is obtained by multiplying the print length by four. A footprint can also provide clues about the kind of dinosaur that made it. A three-toed, sharp-clawed print means the footprint-maker was likely a theropod-usually a carnivore. A three-toed print with rounded toes probably belonged to an ornithopod dinosaur-an herbivore.
Dinosaur Names
The longest dinosaur name ever? Say hello to Micropachycephalosaurus. It means “tiny thick-headed lizard” and is one of the smallest dinosaurs ever discovered. It has 23 letters and nine syllables. Its name means “small, thick-headed lizard” and is pronounced “mike-row-pak-ee-keff-ah-loh-sore-us”. Other dinosaurs with notably long names include Carcharodontosaurus (19 letters), dubbed the “shark tooth lizard,” and Archaeornithomimus (18 letters), which means “ancient bird mimic”. These names often derive from Greek or Latin roots that describe features such as appearance, teeth, or behavior. Naming a new dinosaur species is a serious job for paleontologists.
The Extinction of Dinosaurs
About 66 million years ago, a massive asteroid hit the Earth near what is now Mexico. The impact caused wildfires, earthquakes, and a dust cloud that blocked sunlight for months. This led to a dramatic drop in temperature, killing off plants and the animals that depended on them - including the dinosaurs. But not all was lost. Some small creatures survived, and from one lineage of small, feathered dinosaurs, birds eventually emerged. No one is exactly sure why the dinosaurs died out almost 66 million years ago. Some believe the climate became too hot or cold for them to exist. Others say that a huge asteroid collided with Earth. A massive asteroid likely triggered their extinction. This impact caused climate changes that ended the age of dinosaurs. There are several theories as to what may have contributed to the mass extinction of non-avian dinosaurs and other species at the end of the Cretaceous Period. It is certain that a massive asteroid or comet struck Earth during this time, causing a dramatic shift in Earth’s climate. Some scientists speculate that this impact had catastrophic consequences for life on Earth.
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Dinosaur Classification
Scientists have divided dinosaurs into two large groups. The groups are based on the way a dinosaur’s hip bones were shaped. One group is the Ornithischia, or bird-hipped dinosaurs. Members of this group are called ornithischians. The other is the Saurischia, or lizard-hipped dinosaurs. Members of this group are called saurischians. Scientists have divided dinosaurs into Ornithischia, or bird-hipped dinosaurs, and Saurischia, or lizard-hipped dinosaurs.
Ornithischian Dinosaurs
The ornithischians had hips shaped like the hips of today’s birds. Despite this similarity, however, today’s birds are not related to the ornithischians. The ornithischians were plant eaters. They walked on either two or four thick, sturdy legs. Ornithischians generally had flat teeth to grind tough plants. They also had an extra bone at the tip of the lower jaw. This bone joined the two halves of the lower jaw together. It also helped to form a horny beak that made it easier for the dinosaurs to bite plants. Many of the ornithischian dinosaurs had special features. Some, such as Triceratops, had horns like a modern rhinoceros. Euoplocephalus had a huge club at the end of its tail. Stegosaurus had large, triangular bony plates sticking out of its back.
Saurischian Dinosaurs
The saurischians had hips that look like the hips of today’s reptiles. But they also had some features in common with today’s birds. In fact, scientists believe that the saurischians are more closely related to birds than to some other dinosaurs. Archaeopteryx was a saurischian. The saurischians are divided into the meat-eating theropods and the plant-eating sauropods.
Theropods
The theropods include all the meat-eating dinosaurs. Among them is the fierce Tyrannosaurus rex, which weighed as much as eight tons. Giganotosaurus and Spinosaurus were even larger. Theropods walked on their two back legs. Most of them were built to hunt. They used their short front arms to catch and tear prey. Their fingers and toes had long, sharp claws. They had powerful jaws and sharp teeth for tearing flesh. Theropods normally hunted alone. They caught and ate smaller, plant-eating dinosaurs. Sometimes they hunted in groups and attacked larger dinosaurs. Most theropod dinosaurs, such as Tyrannosaurus, had teeth that were pointed, slightly curved backwards, and serrated. The sharp points pierced the meat, and the serrations helped slice it by catching and tearing muscle fibers. Meat eaters didn’t chop or grind their food; they swallowed chunks whole. T. rex had an ultra-powerful bite. It could chomp through bone with a force of more than 12,000 pounds.
Sauropods
Sauropods were not only the largest of all dinosaurs. They were also the largest land animals that ever lived. Sauropods were plant eaters that walked on four legs. Brachiosaurus, Diplodocus, and Apatosaurus are examples of sauropods. Sauropods had a very small head and brain when compared to their huge body. But they had a long neck, which let them reach leaves on even the tallest trees. They had thick, strong legs, like those of an elephant. Many sauropods probably could stand up on their back legs to reach even higher into the trees. They used their long, muscular tail to balance themselves when standing. The long-necked dinosaurs, such as Diplodocus, had long pencil-like teeth that they used to rake the leaves off branches. These dinosaurs swallowed the leaves whole. They also ingested small stones, called gastroliths, most likely to grind up the food in their stomachs, much the same way modern birds, such as parakeets and chickens, do today.
Specific Dinosaur Facts
Argentinosaurus
The biggest dinosaur may have weighed more than a Boeing 737. Argentinosaurus could weigh over 100 tons and reach lengths over 100 feet.
Brachiosaurus
Brachiosaurus could lift its head 40 feet in the air. It used its long neck to reach the highest trees.
Megalosaurus
The Megalosaurus was discovered by William Buckland, a professor of geology at the University of Oxford. William Buckland shared his fossil findings with the Geological Society of London in 1824, 200 years ago.
Parvicursor
Some dinosaurs were tiny and fast. Dinosaurs like Parvicursor were no bigger than a housecat and could run quickly.
Stegosaurus
Stegosaurus had a brain the size of a lime. Despite its massive body, its brain was unusually small for its size.
Triceratops
Triceratops had a bony frill and three sharp horns. Its skull made up nearly a third of its body length.
Velociraptors
Velociraptors were much smaller than in the movies. Real velociraptors were about the size of turkeys and covered in feathers.
Ancient California
Did you know that dinosaurs once lived in California? Millions of years ago, our state was home to some fascinating prehistoric creatures! That’s right, as of 2017, California has its very own official state dinosaur. Auggie was a type of dino species called a Hadrosaur, also known as a duck-billed dinosaur. Before the 1930s, scientists hadn’t found any dinosaur fossils in California. Can you guess what the first dinosaur fossil ever found in California was? If you said Auggie, you are correct! As we mentioned earlier, Augustynolophus was a type of Hadrosaur, meaning it had a mouth that looked like a duck bill. Aletopelta was a type of Nodosaur, which means its body was covered in strong bony plates and spikes. This was like having built-in armor to protect them from predators. Albertosaurus dinosaurs are a type of Tyrannosauridae, making them close relatives to the Tyrannosaurus Rex. Albertosaurus were carnivores (meat-eaters), growing up to 26-30 feet in length and weighing 3,750-6,600 lbs. While scientists theorize that lots of different dinosaurs lived in California millions of years ago, very few fossils have been discovered here. During the Age of Dinosaurs, California looked dramatically different from how it does today. Much of the state was covered by warm, shallow seawater. Shastasaurus S. Shastasaurus (“Mount Shasta Lizard”) was a marine reptile that lived over 252 million years ago. Californosaurus (“California Lizard”) lived 237 million years ago in the warm seawater that covered the majority of California. Plesiosaurs were large, swimming reptiles that lived over 200 million years ago. Mosasaurs were aquatic reptiles that lived 82 million years ago in ocean habitats all over the world, including California. Plesiotylosaurus was another marine reptile that lived in the warm seawaters of prehistoric California 72 million years ago. Plotosaurus was a fast-swimming marine reptile that lived about 70 million years ago, near the end of the Cretaceous period. Dinosaurs and ancient sea creatures may be long gone, but their fossils give us an exciting peek into what California was like millions of years ago. From learning about duck-billed dinosaurs to carnivorous ocean reptiles, these dinosaur facts for kids help bring science and history to life!
Mary Anning
Mary Anning lived in England in the 1800s and found the fossils of an ichthyosaurus by her house when she was just 12 years old.
Lokiceratops
A newly discovered dinosaur, lokiceratops, has a huge, blade-like horn and was found in Montana in 2019.
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