Is god a human creation? Was he invented in an attempt to reconcile the cycles of life and death? Or is there rational evidence to support the existence of a supreme being?

If time travelers are among us, they are probably trying to keep a low profile — but could not resist taking advantage of their knowledge of future events. They will be among the rich and powerful of our time. Accounting for inflation, John D. Rockefeller is often considered the richest person in history.

Most of our physical world and all of the known laws of the universe are perfectly described as mathematical equations. If you look at what makes the matter that makes us, it’s really just small electromagnetic dots. Pixels! Is our world computer generated? Are we simply characters in a SimUniverse?

Einstein himself puzzled at this question. On the quantum level, the act of observing a thing changes it. Sparking one of quantum physics’ greatest questions: Is reality dependent on the observer?

We’ve been looking for signs of life in all the obvious places, and so far have come up empty. Here on earth, life exists and even thrives in the most extreme conditions. Are there environments in the universe we’ve overlooked that could harbor life?