physics

If there is intelligent life beyond Earth, how would that change life ON Earth?News that life might exist or have existed on Mars or somewhere else in our…

There's still time for deep and thoughtful reading this summer -- and our 500th episode.When John Perry and Ken Taylor began shopping around their idea of…

Are Space and Time two separate entities, or just different dimensions of one thing? And what difference does that make?Strange things are said about…

Are dark matter and dark energy scientific fact or scientific theory -- and why would that matter?Dark energy and dark matter are mysterious entities that…

Science can explain what happens. But can it explain why anything happens at all? The old metaphysical question – why anything exists at all – has…

How could the smartest, most observant people around believe for millennia that the sun and all the planets and stars all revolved around the Earth? Even…

If only the present moment exists, where does the future come from?St. Augustine suggested that when we try to grasp the idea of time, it seems to evade…

Would there still be colors in the world if there was no one around to see them?Is the red you see indeed the very same red that anyone else does? What is…

What in the world is a Monad? Why does Leibniz care so much about the so-called Principle of Sufficient Reason? And how could he claim that this is the…

Is it just dumb luck that the universe has just the right settings to support life as we know it?If the precise value of many physical constants had been…