Frontiers of science

News Headline: “NASA to slam a spaceship into asteroid for practice.”
News Headline: “Engineers to simulate a 6.7 earthquake at UC San Diego.”
What could possibly go wrong?
Meanwhile, Jeff Corder, a Chicago reader, wants you to know that a 75,000-mile-wide hole opened this week on the sun.
But scientists say it is probably no reason for concern.
Even if it is still growing.


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