However, Kim added, in the meantime there may be other ways of detecting dark matter's influence on space-time. "I am currently investigating the prospect of rapidly rotating neutron stars as ...

What we experience as gravity is caused by this bending of space-time. This is the main idea of general relativity and was summarised by the American physicist John Wheeler who said: "Matter tells ...

The universe began with a vast explosion that generated space and time, and created all the matter and energy in the universe. Exactly what triggered this sudden expansion remains a mystery.

It includes all of space, and all the matter and energy in space. It even includes time, and it includes you too. No one knows the exact size of the Universe because we cannot see the edge!