Black hole imaged, a new tiny human, rebuilding coral reefs, Treating depression with ketamine, flipper fornicates for fun and why cats purr

Quirks and Quarks

Seeing the first black hole - and what we'll see next; A new tiny hominin discovery gives the 'hobbit' a distant cousin; Collapsing coral reefs - can we rebuild them?; Ketamine works its magic on depression by 'stabilizing the brain in a well state'; Female dolphins may know the joy of sex thanks to a human-like clitoris; How and why do cats purr?

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