Indeed, since the 1950s, physicists have discovered that life in the universe depends upon a highly improbable set of forces and features as well as an extremely improbable balance among many of them. The precise strengths of the fundamental forces of physics, the arrangement of matter and energy at the beginning of the universe, and many other specific features of the cosmos appear delicately balanced to allow for the possibility of life. If any one of these properties were altered ever so slightly, complex chemistry and life simply would not exist.
