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Like all science, you start with a thought and then add evidence until either your thought is proved wrong or as the evidence increases it is supposed to be right.
In the case of the extinction of the dinosaurs there are various things which pointed to this as an end of the dinosaurs. All around the earth in the earths crust there is a layer of 'dust'. This layer can only have got everywhere by being thrown into the atmosphere by a collision of such huge proportions as to have to be an asteroid (or indeed a comet).
A six-mile-wide (ten-kilometer-wide) asteroid is thought to have carved out the Chicxulub crater off Mexico's Yucatán Peninsula, triggering worldwide climate changes that led to the mass extinction.
More recently, there has been a second larger crater found on the Indian ocean floor. one or both of these would have been enough to wipe out the dinosaurs (
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoBecause of the carbon dating in the fossils of the dinosaurs that they find.
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How do you know about dinosaurs and their habitats?
I know about dinosaurs and their habitats from reading about them. Scientists learn about dinosaurs and their habitats by studying fossils.
How do you know where the dinosaurs lived?
bones
How do scientists know that mollusks lived in Earth's oceans about 540 millions years ago?
fossils
How do scientists know everything but not how the dinosaurs died out?
Scientists don't know everything, nor do they claim to know everything.There's a lot of compelling evidence to suggest that the dinosaurs were killed of by a massive meteorite impact.
Were dinosaurs living in northwest Washington?
all i know is megalodon lived in Washington no dinosaurs
Which dinosaurs live in water?
No dinosaurs lived in water. The prehistoric reptiles that lived in water were the Plesiosaurs, not dinosaurs.
Were there dinosaurs?
The dinosaurs were a group of prehistoric reptiles that ruled Earth for about 160 million years. People did not even know dinosaurs existed until the 1800's. That may seem like a long time ago, but it is a very short time when you remember how long ago the dinosaurs lived-more than 65 million years ago. There is much still to learn, and the scientists of the future-the students of today-may be the ones who solve the mysteries of the dinosaurs.
How do scientists know that dinosaurs once roamed New Jersey?
Fossils and the fact that we were once Pangea and dinosaurs were everywhere
How do dinosaurs camouflage?
Scientists do not know much about dinosaur coloration. We only know the coloration of a few types of small, feathered dinosaurs, some of which had bright coloration.
How do you know when dinosaurs lived on the earth?
You used past tense on the word lived. How do you know they all died? They lived on earth with humans, because God created everything in 6 days, so dinosuars are a part of everything, right? So Adam and Eve HAD to have seen dinosaurs, right? Creationists have found footprints of human and dinosaur feet walking next to each other so dinosaurs lived with humans. Have you ever heard of the Loch Ness Monster? It's description describes a body of a water dinosaur, so the Loch Ness Monster could very well be a dinosaur that never went away. All dinosaurs haven't gone extinct!
What percentage of life was wiped out with the dinosaurs?
Earth is 4.55 billion years old. If you don't count birds, Dinosaurs were around for 166 million years or about 3.6% of Earth's history. If you count birds as dinosaurs, which most scientists now do, dinosaurs have been around for 231 million years or about 5% of Earth's history.
How do you know that dinosaurs lived millions ago?
Various fossils found buried.
