a star expels most of its outer material until only the hot core remains, which then settles down to become a young a white dwarf
Strip mining is taking away the surface, literally scraping the surface away to remove coal.
Sexual reproduction offers genetic variation, as the offspring are a combination of 2 sets of genes opposed to one. This ultimately leads to evolution and the adaption to changing environments :)
Its found in the tectum of the dorsal aspect of the midbrain
