Energy at the Beginning of the Universe Around 14 billion years ago the universe began with an event that released...

Belief as a Hidden Force in Human Society Much of human civilization is built upon belief. Whether we acknowledge it...

Ancient Ideas About the Nature of Matter More than two thousand years ago, the Greek philosopher Anaxagoras proposed a remarkably...

The Death of Stars and the Seeds of Life As stars grow old, they become increasingly unstable. Near the end...

Determinism and the Idea of a Predictable Universe In Western philosophy, determinism proposes that every event has a cause and...

The Mind and the Cosmic Scale of Complexity The human brain is an astonishingly complex system. An adult brain contains...

From Grains of Sand to Fundamental Particles If the Sun were a single grain of sand on a vast beach,...

Motion, Rotation, and an Unexpected Problem When we observe the universe, nothing appears to be truly at rest. From the...

Rotation as a Fundamental Property of Black Holes Rotation, or angular momentum, is one of the most common properties of...

Infinity as a Concept in Physics and the Universe Infinity is a familiar idea in mathematics and philosophy, yet it...