Mammoths is a close relative of the elephant. It is no longer around because it could not adapt.And also that still doesn't explain the island scenario, it's not same species with different adaptations, were talking totally different types of lifeEverything always fills a niche. But there are always predators.Unless they fill a niche, then they are optimized animals, not apex predators but they have survived for millions of years.Correct. A moths wings may get darker but it's still going to be a moth.So life adapts, but doesn't evolve?
Tell me this. Why should something change into another species? Answer - improve its chances at survival. Then why no changes in many creatures said to be millions of years old? They are far from being optimized creatures.
It's because species do not change into other species.