Or any test that doesn't consist of gently tapping it on the side...
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Oh, you are thinking they fired a bullet at it? No, they just tossed one.
https://www.scientificamerican.com/a...astrophysics1/
Some three billion years ago, when Earth was a sprightly ocean world dotted with protocontinents and inhabited solely by single-celled organisms, a pair of black holes spiraled together and collided in a far-off region of the universe, leaving behind a single black hole some 50 times heavier than our sun.
Wireless mouse that charges up via the mouse pad O_O
https://arstechnica.com/gadgets/2017...ng/?comments=1
Sense8 was costing Netflix around $9 million per episode, more expensive than Game of Thrones.