Found at the lowest point of a large drainage area, these seasonal, marsh-like ponds collect and store water from rain and runoff. Unlike vernal pools, playas generally fill when temperatures are unsuitable for plant growth, and often the water is salty, alkali or both.
source- google
It doesn't, it gets colder as you go higher.
Evolution effects us today as we are always evolving to live in different places and do different things as for the animals they are also evolving to the world around them. We have evolved from gorillas so therefore that effects us in the term that we should still be evolving
