human evolution timeline

What's been the role of climate change in the development of humans?
Which early human species was thought to be the first to use tools made from stone?Homo habilis, this species was thought to represent the first manufacturer of stone tools.
Who were the first human species to travel to and live in Europe? When?Homo heidelbergensis,These were the first early humans to venture into the cold latitudes of Europe, where there is evidence that they were the first species to build shelters and hunt big game animals with wooden spears.

On longer timescales, hominins experienced changes in temperature and precipitation, which, in turn, caused large changes in vegetation, were also altered by earthquakes and uprising. Tectonic activity can change the location and size of lakes and rivers.
When there is a change in an animal's preferred habitat, they can move and track their favorite habitat, or adapt through a genetic change to the new habitat. Otherwise, they become extinct. However, another possibility is that the adaptive capacity of a population increases.

In your opinion, what is the most significant milestone for the human evolution? Why?
I think the most important milestone is when they learned to use tools made of stone, using one of them. And also the use and discovery of fire.

Which species survived for the longest time? For how long?
Homo Erectus, It was the longest-living species on our family tree, surviving more than nine times longer than our own species.