The first known member of the giraffe family, Climacoceros, was a deer like animal. As time went on and the giraffes became browsers (leaf eaters), they evolved longer necks and legs to reach leaves that were too high for other animals. Eventually, all short necked species of the giraffe family, except the okapi, became extinct.
what do scientist believe is happening to the segments of the earths crust
they believe that the earth is moving
They do not think plant life 'came' to Earth. They believe it evolved here.
A geologist is a scientist that studies the Earth.
No, that hypothesis has not been proposed within mainstream science.
No the sun will never scorch the earth. Scientist have studied this and believe it to not be true. Although some people have Their douts.
No scientist found the Earth.
do you believe that elephants can fly? do you also think that giraffes can dance? obviously pancakes can talk. but who really cares if they can or not, shouldn't the real question be about what they say? or if they believe in large beasts who roam the earth?
There is only 1 species of giraffes however there are multiple subspecies.
Earth and the other planets formed around this time.
scientist that contribute in physical earth science
This was not one particular scientist - as far as we know. It was the generally accepted idea in antiquity. Perhaps the idea started from one particular scientist, but in that case, his name is probably lost.