title: Life and evolution as physics.
abstract: What is evolution and why does it exist in the biological, geophysical and technological realms - in short, everywhere? Why is there a time direction - a time arrow - in the changes we know are happening every moment and everywhere? Why is the present different than the past? These are questions of physics, about everything, not just biology. The answer is that nothing lives, flows and moves unless it is driven by power. Physics sheds light on the natural engines that produce the power destroyed by the flows, and on the free morphing that leads to flow architectures naturally and universally. There is a unifying tendency across all domains to evolve into flow configurations that provide greater access for movement. This tendency is expressed as the constructal law of evolutionary flow organization everywhere. Here I illustrate how this law of physics accounts for and unites the life and evolution phenomena throughout nature, animate and inanimate.
authors.affiliation: Duke University, Department of Mechanical Engineering and Materials Science , Durham, NC, USA.
authors.forename: Adrian
authors.initials: A
authors.lastname: Bejan
keywords: constructal law; evolution; growth; life; physics; thermodynamics