Marvel has created many formidable heroes, with some of them able to take out whole teams completely on their own.
Space.com on MSN
NASA X-ray instrument finds black holes act like 'cosmic seesaws' shaping the universe
Instead, this new research suggests that black holes actually act like "cosmic seesaws," switching between these two distinct ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback