Fossil records show us that over time animals have 'changed' and become better adapted to their surroundings and so we can see similar characteristics in a horse from 100, 000 years ago in our present day horses. This supports the theory of evolution
All that is needed is a warmer, lighter fluid below a cooler, heavier one.
Since warm water is lighter, it will rise, and will cool from the top will flow down to replace it, this makes it go in motion
Be alone make you go faster but be in a community make you go longer.
The term that can be used to describe evolution by natural selection is SCIENTIFIC THEORY.
Theory means "the best explanation so far."
Scientific theory is a work in progress. It is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method, and repeatedly confirmed through observation and experimentation.