The dinosaurs became extinct approximately 65 million years ago. What killed the dinosaurs? They were likely killed due to after-effects of an asteroid impact off the Yucatan Peninsula.
There are a lot of theories about what caused the extinction of the dinosaurs, but a widely accepted theory is that an asteroid almost 9 miles in diameter hit the Earth about 65 million years ago. The impact penetrated the Earth’s crust, scattering dust and debris into the atmosphere, causing wide spread fires, eruptions of volcanoes, massive tsunamis, and severe storms with high concentrations of acidic rain. The dust and debris thrust into the atmosphere blocking most of the sunlight for months which lowered the global temperature. Those plants and organisms that could not adapt to the temperature and light changes died out. The herbivores, who ate those plants. starved soon after the plants died and the carnivores who ate herbivores would not have food so they would soon have to eat one another, and eventually die out.
Which Dinosaur was the Biggest?
The biggest dinosaurs were sauropods; they were gigantic, slow-moving, tiny-headed, cow-like plant-eaters from the late Jurassic period and the early Cretaceous period. They had exceptionally long necks, which proved useful for reaching high-level vegetation and a massive tail to counterbalance their long neck.
The following are the largest sauropods:
1. Argentinosaurus was 115-130 feet long
2. Seismosaurus was 120 feet long
3. Supersaurus was 100-130 feet long
4. Ultrasauros was 100+ feet long
5. Andesaurus was 130 feet
6. Bruhathkayosaurus was 130 feet
7. Argyrosaurus was 65-130 feet
8. Giraffatitan was 75-100 feet
9. Diplodocus grew up to 90 feet long
What Are the 5 Smallest Dinosaurs? (that we know of)
1. A new, crow-sized theropod, Microraptor was recently found in China measuring about 16 inches and may be a fully grown adult.
2. Compsognathus, a theropod 2 feet long, from 145 million years ago has also been found and was the size of a chicken weighing about 6.5 pounds.
3. Saltopus was only 2 feet long
4. Lesothosaurus was 3 feet long
5. Wannanosaurus was 39 inches long
Which Dinosaur was the Largest Meat Eater?
1. Giganotosaurus was 47 feet long, weighed 8 tons and measured a whopping 12 feet tall.
2. Tyrannosaurus rex was 40-50 feet long and weighed 6 tons.
3. Spinosaurus was close to 40-50 feet long.
4. Carcharodontosaurus was probably about 45 feet long and had 5 inch long teeth.
What was the First Dinosaur Fossil to be Found?
There are references to “dragon” bones found in Wucheng, Sichuan, China over 2,000 years ago; these were probably dinosaur fossils. In 1676, a huge thigh bone was found in England by Reverend Plot. In 1824, the first dinosaur to be described scientifically was Megalosaurus. It was described by William Buckland, a British fossil hunter and clergyman.
What is the Oldest Dinosaur Ever Found?
Until recently, the oldest dinosaur found was Eoraptor estimated to be approximately 228 million years old. Recent prosauropods from Madagascar are the oldest, about 230 million years old. Other very early dinosaurs include species such as Pisanosaurus, Saturnalia, Herrerasaurus, Staurikosaurus and Lesothosaurus.
How Many Types of Dinosaurs Were There?
The actual number of dinosaurs that lived is unknown, but below is what is known so fa,r based on the fossils that have been uncovered by scientists.
There are over 500 dinosaur genera that have been found, named, and scientifically accepted.
There are an additional 100 genera that are dubious and are usually represented by highly incomplete fossils.
There are also almost 100 newly-discovered genera whose names have not been through the formal naming process.
What Year was Sue the Dinosaur’s Fossils Found?
“Sue” is the nickname given to the largest, most complete, and best preserved Tyrannosaurus Rex specimen ever found. It was discovered in the summer of 1990 by Sue Hendrickson, a paleontologist, and was named after her. You can see the dinosaur at the Field Museum of Natural History in Chicago, Illinois.
Were There any Flying Dinosaurs?
Did birds evolve from dinosaurs? Although the birds likely evolved from the dinosaurs, pre-avian dinosaurs probably could not fly. But there were many flying, non-avian reptiles that lived during the time of the dinosaurs. They were the pterosaurs which included Plesiosaurus, Pteranodon, Pterodactylus, Dimorphodon, Rhamphorhynchus, Quetzalcoatlus, along with others.
What are Pterosaurs?
Pterosaurs were flying, prehistoric reptiles. They were not dinosaurs, but were closely related to them. They existed from the late Triassic to the end of the Cretaceous Period. Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the legs to a dramatically lengthened fourth finger. Early species had long, fully-toothed jaws and long tails, while later forms had a highly reduced tail, and some lacked teeth.