There is not sufficient proof as to why dinosaurs went extinct, but experts believe it is related to geological events, diseases, climate change and lack of plant life for sustenance. The last known dinosaurs, according to their fossils, existed about 65 million years ago.
Over the years, there have been many theories and speculations about why dinosaurs went extinct. As more fossils are attained and technology allows science to advance further, palaeontologists have new theories. A persistent theory is that the sunlight was blocked by a large meteorite that crashed into the Earth. Without the sun, plants were unable to grow, and plant-eating dinosaurs would have died without a proper food source. Without herbivore dinosaurs, the carnivore dinosaurs also lose their food source.Learn More
Dinosaurs lived during the Mesozoic era, between 250 and 65 million years ago. The earliest discovered dinosaur species, Nyasasaurus parringtoni, dates from 245 million years ago. Dinosaur fossils are most common between rock strata that are 225 to 65 million years old.Full Answer >
In May 2014, the BBC reported that a discovery of the largest known dinosaur skeleton had taken place in Argentina; this dinosaur belongs to a group of large herbivorous dinosaurs known as Titanosaurus, which lived in the Late Cretaceous period. This skeleton, which was discovered by an Argentine farm laborer in a desert area about 130 miles west of Patagonia, included massive thigh bones that scientists used to make height and weight estimates. Based on these estimates, the dinosaur is thought to have weighed about 85 tons, also measuring 130 feet long and 65 feet tall at its highest point.Full Answer >
All dinosaurs laid eggs, which were fertilized through sexual reproduction between a male and a female. There is evidence that some species of dinosaurs cared for their young during incubation and after hatching.Full Answer >
The Tyrannosaurus rex, like other dinosaurs and their surviving modern-day bird relatives, reproduced sexually. The female then laid fertilized eggs from which newborn tyrannosaurs would hatch.Full Answer >