#OldieButGoodie: So, uh, they made a black hole. https://www.nature.com/articles/s41567-020-01160-5?fbclid=IwAR2gFvhijMinYFAHxDm8sKYKLPZqob8-NZdHOAmNkvi-gfBUugAtyN8dVi4
@amber By making material really, really cold, they made a thing that sound can't get out of. Because sound works a lot like light works, it's analogous to a black hole.
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