Space
Black hole breakthrough: a lot done, much more to do
The first direct image of a black hole is another triumph for Einstein's general relativity – but to make further progress we must look for even better theories
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The first direct image of a black hole is another triumph for Einstein's general relativity – but to make further progress we must look for even better theories
Firing a laser at a pair of black holes can produce more energy than you start with, letting you travel the galaxy without needing a large amount of fuel