Dinosaurs are a group of reptiles that have lived on Earth for about 245 million years. Over a thousand dinosaur species once roamed the Earth.
These models of prehistoric dinosaurs are made of 1/8" acrylic and can be ordered in a variety of colors. They are durable can suitable for display in the classroom, office, or child's room.
Available colors are:
- Transparent Bronze
- Grey "Smoked"
- Transparent Blue
- Transparent Green
- Transparent Orange
- Transparent Red
- Transparent Yellow
Scientists first began studying dinosaurs during the 1820s, when they discovered the bones of a large land reptile they dubbed a Megalosaurus (“big lizard”) buried in the English countryside. Scientists have traditionally divided the dinosaur group into two orders: the “bird-hipped” Ornithischia and the “lizard-hipped” Saurischia.
Some dinosaurs were bipedal, which means they walked on two legs. Some walked on four legs (quadrupedal), and some were able to switch between these two walking styles. Some dinosaurs were covered with a type of body armor, and some probably had feathers, like their modern bird relatives. Some moved quickly, while others were lumbering and slow. Most dinosaurs were herbivores, or plant-eaters, but some were carnivorous and hunted or scavenged other dinosaurs in order to survive.
Dinosaurs mysteriously disappeared at the end of the Cretaceous Period, around 65 million years ago. Scientists have also discovered that a giant asteroid hit Earth about 65.5 million years ago, landing with the force of 180 trillion tons of TNT and spreading an enormous amount of ash all over the Earth’s surface. Deprived of water and sunlight, plants and algae would have died, killing off the planet’s herbivores; after a period of surviving on the carcasses of these herbivores, carnivores would have died out as well.
-History.com