You are given a sentence and your task is to generate another sentence that supports the given input.

Birds evolved from reptiles some 60 million years ago, and in that time the humble scales of the lizard-like ancestor of the bird (archaeopteryx) have been transformed into the staggering diversity and beauty that we now know as the plumage of modern birds.
Birds evolved from reptile ancestors.

It is the second law of thermodynamics that explains why chemical reactions occur.
Chemical reactions follow the laws of thermodynamics.

Gas transport, carried out by the cardiovascular system, is the process of distributing the oxygen throughout the body and collecting CO2 and returning it to the lungs.

One function of the cardiovascular system is to transport gases throughout the body.