Most cosmologists believe that the Universe, and with it space and time, exploded into being some 13.7 billion years ago at the Big Bang, and that it has been expanding ever since. A crucial component of the standard cosmological model—needed to explain why the Universe is so uniform—is the idea that a fraction of a second after the Big Bang, the Universe underwent a brief period of extremely rapid expansion known as inflation. Penrose, however, thinks that the Universe’s great uniformity instead originates from before the Big Bang, from the tail end of a previous aeon that saw the Universe expand to become infinitely large and very smooth.
Chemical changes inside Mars' core caused it to lose its magnetic field. This, in turn, caused it to lose its oceans. But how?
A more distant galaxy liked the lens so much that it went and put a ring on it. Here's the science behind this remarkable cosmic object.
A "stakehodler" has both a voice and a vote, an economic interest in how each network stewards important global resources.
This measurement is crucial to confirm that one of the assumptions of Einstein’s theory of gravity is valid.