Homecoming hugs

NASA astronaut Christina Koch and Canadian astronaut Jeremy Hansen get welcome-home hugs at Naval Air Station North Island in California. (NASA Photo / Keegan Barber)

By Alan Boyle

Mastermind of Cosmic Log, contributor to GeekWire and Universe Today, author of "The Case for Pluto: How a Little Planet Made a Big Difference," past president of the Council for the Advancement of Science Writing.

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