Why did dinosaurs disappear from earth?

Answer 1

Theories to why dinosaurs disappeared:

Some scientists think dinosaurs died out due to rapid evolution of flowering plants.

It goes like this: Up until the flowering plants came, the dinosaurs ate things like pine needles from evergreen trees. Then flowering plants came, replacing many of the pine trees. Dinosaurs didn't have time to switch their diet to flowers and, as a result, died of starvation.

Another recent and popular theory is: A giant meteorite, 6 miles across, struck the Earth. This collision would have produced an explosive force and damage similar to that of nuclear war. Vast amounts of dust, debris, and ash would have spread quickly around the planet, blocking out the sunlight reaching Earth's surface. Lack of sunlight is believed to have lasted for several months and to have caused temperatures to drop worldwide from 66 degrees Fahrenheit to about 14 degrees. Without sunlight to perform photosynthesis, many plants would have died, causing a domino-like effect on the food chain, including the dinosaurs.

Another theory involves a series of volcanic eruptions in what is now India that formed what we call the Deccan Traps. This massive volcanic episode would likely have had massive climatic changes worldwide. It has even been proposed that the shockwaves from the asteroid impact may have triggered the vulcanism.

Answer 2

About 65 million years ago, this gigantic asteroid comes down and crashes into the Earth. It makes a ton of huge earthquakes and tidal waves, but the worst part of it is the gargantuan cloud of dust that completely envelopes the Earth and blocks out the sun. This kills all the plants, which means no food for herbivores (who die), which means no food for carnivores (who die). So, the only creatures that survive are the rodents, who burrowed or something, and all the sea creatures (sharks, alligators, etc) who don't rely on the sun.

There is some debate about the asteroid, but it is the answer accepted by about 99% of people, because

a) they found an enormous crate somewhere underwater near Mexico

b) they've found lots of elements and minerals nearby that only happen in that quantity on asteroids.

Answer 3

Dinosaurs were scarce antidiluvian, as were all other animals. As dinosaurs treaded on human territory, the rest of them were eliminated by their worst predator: Mankind. Why does everyone always wonder about the simple fact of extinction? Sincerely J.Macaluso Mars, PA

Answer 4

There are lots of different theories about what happened to them. The most likely one is due to a broiling hot asteroid, TEN TIMES HOTTER THEN THE SUN! They have even found a huge crater and it dates back to then, but we are still not that sure.

Other theories have been floods, earthquakes, volcanos, they attacked each other, and a LOT more.

Answer 5

Scientists believe that an asteroid made the dinosaurs disappear from Earth. However, we will never know for sure.

Answer 6

An Ice Age is the theory.

Answer 7

because of the meteor

Answer 8

A "Harry Potter" cloak!