how many years ago were dinosuars around?

Answer 1

Dinosaurs became extinct about 65 million years ago.

Answer 2

Dinosaurs were vertebrate animals that dominated terrestrial ecosystems for over 160 million years, first appearing approximately 230 million years ago. 65 million years ago, at the end of the Cretaceous Period, a catastrophic extinction event ended dinosaurs' dominance on land. At least one significant group of dinosaurs has survived until the present day; taxonomists consider modern birds to be the direct descendants of theropod dinosaurs.

Since the first dinosaur was recognized in the 19th century, mounted, fossilized dinosaur skeletons have become major attractions at museums around the world. Dinosaurs have become a part of world culture and remain consistently popular among children and adults alike. They have been featured in best-selling books and films such as Jurassic Park, and new discoveries are regularly covered by the media.

The term dinosaur is sometimes used informally to describe other prehistoric reptiles, such as the pelycosaur Dimetrodon, the winged pterosaurs and the aquatic ichthyosaurs, plesiosaurs and mosasaurs, although technically none of these were dinosaurs.

You could get more information from the link below...

Answer 3

Crikey Samantha C, you've got a real mixed bag of good and rotten answers here haven't you - none of them with any sources I see !

Dinosaurs were land archosaurs with an upright gait. Dinosaurs were reptiles that evolved an upright gait similar to that of mammals, ie their legs were straight, perpendicular to the ground and supported the weight of the body so that they could walk or run more easily. Other reptiles and modern lizards have a sprawling gait (like crocodiles). Dinosaurs ruled the Earth for 160 million years.

Archosaurs (literally 'ruling lizards') are a large group of reptiles that appeared about 250 million years ago. As well as giving rise to the dinosaurs, they include non-dinosaur groups such as the pterosaurs (flying reptiles), now extinct, and crocodiles whose descendants still live today.

As well as these non-dinosaur archosaurs there were many other ancient reptiles that are often wrongly called dinosaurs.

The timeline of dinosaurs starts 227 million years ago in the Upper Triassic period and finishes 65 million years ago in the Upper Cretaceous period.

Please see my link below to the Natural History Museum

Answer 4

why spoiling yr precious time of life for that fear of dinosuars. what used of this question. first think about present and future. do not worry about past. past only mirror which we can see our failiour and make our mission best.

Answer 5

HI SAMANTHA
WHEN THE EARTH FORMED ABOUT 4,600 MILLION YEARS AGO ATMOSPHERE CONSISTED OF VOLCANIC GASES WITH LITTLE OXYGEN.
THERE WERE 17 PERIODS:
1.PRECAMBRIAN
2.CARBONIFEROUS
3.TRIASSIC PERIOD
4.JURASSIC PERIOD
5.CRETACEOUS PERIOD
6.TERTIARY PERIOD
7.QUATERARY PERIOD
8.EARLY SIGNS OF LIFE
9.AMPHIBIANS AND REPTILES
10.THE DINOSAURS
11.THEROPODS
12.SAUROPODOMORPHS
13.THEFREOPHORANS
14.ORNITHOPODS
15.MARGINOSEPHALIANS
16.MAMMALS
17.THE FIRST HOMINIDS.

Answer 6

65-100 million years ago. some fossils are being found now of some that go back even further

Answer 7

last week i saw one in the tropical forests of Kerala India....it was half the size of an elephant weighing eazily some 3000 plus pounds....believe me man

Answer 8

Actually some still roam the earth..crocodiles, alligators...just evolved..and than their is Nessie and the giant squid...we are not alone: )

Answer 9

I`m not sure about that because I`m not good at history.But I think it is 15 billion/million years ago.

Answer 10

i believe there are still some small ones and 'ocean' ones still alive.