Scientists have subjected Albert Einstein's famous theory of gravity to its toughest real-world test so far and it has prevailed.

WSJ: Einstein Proved Right on Gravity��Again

Though Einstein's framework remains intact so far, "the study is significant for the way observations by astronomers are helping to identify new, extreme cases" to test his general theory of gravity, said Dr. Wang.

WSJ: Einstein Proved Right on Gravity��Again

These quantum jumps can test Newton's theory of gravity - and any variations from it - with unprecedented precision.

BBC: Neutrons could test Newton's gravity and string theory