There are multiple theories as to why dinosaurs died out, such as asteroid impact, volcanic activity, and climate change. There are many theories because none has been proven to be 100 percent certain as the reason for the dinosaurs’ demise.Know More
The asteroid impact theory suggests that dinosaurs died in a massive extinction as a result of a large asteroid hitting the planet. Evidence that supports this theory includes the presence of a metal called iridium in places where dinosaur fossils have been found. Iridium is a rare metal that is not commonly found on Earth, but is a common material in asteroids. Scientists believe the impact from the asteroid could have lead to the development of tsunamis and forest fires, as well as creating a layer of dust and ash that blocked out the light from the sun, plunging the planet into darkness and cold.
Other theories suggest that there was an increase in volcanic activity around the time that dinosaurs went extinct and they believe this activity would have destroyed habitats and pushed enough ash into the atmosphere to affect the climate and destroy vegetation.
The climate change theory states that Earth's climate gradually became cooler and drier, and that dinosaurs could not adapt to the change, leading to their gradual extinction.
Religious theories support the idea that dinosaurs died during the great flood in Noah's time.
While the topic of how dinosaurs went extinct is still up for debate, discoveries of new fossils offer more information about how they lived.Learn More
There are a few well-researched theories about why dinosaurs are extinct; one of the most prominent theories hypothesizes that a massive asteroid impact killed off the dinosaurs. Another states that heavy volcanic eruptions across the Earth may have been responsible.Full Answer >
The end of the dinosaurs is one of the greatest mysteries of paleontology. The leading theory of their extinction involves a massive meteor impact, possibly the one that created the Chicxulub crater in Mexico. Alternative theories include multiple global impacts, a sudden change in the sea level and a worldwide increase in volcanic activity that drastically altered the atmosphere and global climate.Full Answer >
The first true dinosaurs first appeared about 230 million years ago. The first dinosaur fossils are distinguished from those of their reptile ancestors by their more upright stance, with legs directly beneath the body instead of splayed to the side, as with other reptiles. The earliest dinosaur fossils were found in South America, although a December 2012 fossil discovery in southern Africa casts some doubt on a South American origin.Full Answer >
Dinosaurs existed during the Mesozoic Era, first appearing around 230 million years ago and dying out about 65 million years ago. However, scientists largely agree that birds are the direct descendants of dinosaurs. If so, then the dinosaurs did not die off completely, only the non-avian variety did.Full Answer >