Rosetta, the Comet, and the Science of Surprise

There is a cliche you hear all the time when scientists describe their experiments: “We expect the unexpected,” or its jokier cousin, “If we knew what we were doing it wouldn’t be called research.” (That second one is often, but dubiously, attributed to Albert Einstein.) But like many cliches, this one is built on a foundation of truth–as the comet explorations by the Rosetta spacecraft and Philae lander keep reminding us.

The latest shocks come from the huge batch of science results rel

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