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Science Says: That Michigan meteor could have been meatier

WASHINGTON — The fireball that streaked through the Michigan sky put on quite a show but as far as potentially killer space rocks, it was merely a flash in the pan.

There are much bigger asteroids careening through our solar system. Scientists who watch for them hope they spot them in time to get people out of the way if a truly dangerous one is heading straight to Earth.

Low oxygen levels, coral bleaching getting worse in oceans

WASHINGTON — Global warming is making the world’s oceans sicker, depleting them of oxygen and harming delicate coral reefs more often, two studies show.

The lower oxygen levels are making marine life far more vulnerable, the researchers said. Oxygen is crucial for nearly all life in the oceans, except for a few microbes.