[Q&A+] Possible Life Under Europa's Ice, Pilotless Alien Spaceships, Hawking Radiation Explained | Q&A 359

Can fish or other marine life realistically exist under the ice of Europa or Enceladus? Can we be visited by an alien spaceship but with no pilot? What is the most common misconception about Hawking radiation? And in Q&A+, which sci-fi book best describes our world in a few hundred years?

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