How Old is Time?

Trying to imagine the beginning of time is just as hard as trying to imagine that time has no beginning. Both possibilities are equally strange and have baffled scholarly minds for centuries. Significant progress in answering this convoluted question was made a little less than 100 years ago when experimental science moved closer to clearing up a seemingly unsolvable problem.

How far away are the stars?

The first major discovery that completely changed our image of the universe was made durin...