What happened before the beginning of time is—by definition, it might be thought—metaphysics. At least one physicist, though, thinks there is nothing meta about the question at all. Roger Penrose, of Oxford University, believes that the Big Bang in which the visible universe began was not actually the beginning of everything. It was merely the latest example of a series of such bangs that renew reality when it is getting tired out. More importantly, he thinks that the pre-Big Bang past has left an imprint on the present that can be detected and analysed, and that he and a colleague in Armenia have found it.
Humanity is never fully in control of its creations. This lesson from Mary Shelley has remained relevant for over 200 years.
There are issues with Kinsey's data, but his books revolutionized Americans' thinking about sex and sexuality.
If Einstein couldn’t solve the theory of everything, could anyone? Physicist Michio Kaku explains what it would take.
The hot Big Bang was an energetic, brilliantly luminous event. Today's Universe is alight with stars. But in between, the dark ages ruled.