The earth rotates around the sun.  Each rotation we call a year, while in fact, it is only an actual distance covered.  So time, in this...

A mathematician once said that there are more real numbers between 0 and 1 than there are counting numbers in the entire universe of...

When you look up at a distant star, you're seeing light that has traveled for millions of years to reach your eyes. From your...

When I look at a tree and form a memory of it, where exactly did that memory come from? Because if you trace it back a bit, the answer...

We’re taught to think so.  Light and dark, two sides of a cosmic coin, battling for space on the world’s stage.  Switch on the light,...

People keep asking, "Is there life out there? Are we really all alone in this vast universe?"  The mathematical probability suggests that...

The best ideas are the ones that could be wrong, and aren't. Consider Einstein's theory of relativity. When he proposed that massive...