Most scientists don’t wear protective headgear while giving talks. Then again, most scientists aren’t the target of pastry-wielding colleagues.
But last October, when astronomer Hal Levison presented what he called a “slightly radical” mechanism for building the solar system’s giant planets, he was ready.
“I’m really a little intimidated about the reaction to this,” Levison said, reaching behind the podium and retrieving a baseball catcher’s mask, which he donned during his presentation, at a planetary science meeting in France.
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