The galaxy is many things. It is very large. It is very confusing. And it may also be an enormous, confusing but maybe navigable
The surprising answer is: nobody knows. Physicists, despite trying for almost a century to rule it out, have so far failed. The known laws of physics do not forbid time travel. In fact, they appear to make it easy - at least in principle.
The speed of light in a vacuum -- 299,792,458 metres per second - is one of the fundamental principles and outcomes of the
Despite being over 100 years old, Einstein's theory of relativity is still inspiring advances in astronomy. The latest breakthrough