Modern humans evolved in Africa, and we now know that human groups from all over the continent contributed to that process. A group of scientists says that means it is time to stop arguing about where in Africa humans 'really' came from
While simple prokaryotic bacteria formed within the first billion years of the Earth, the origin of eurkaryotes, the first cells with nuclei, took much longer.
Raging winds can demolish trees, defoliate entire canopies, and scatter debris across forest floors, radically altering the habitats and reshaping the selective pressures on many organisms