"So I'm not bothered by one more crater being made on the moon,"燚avid Rothery, professor of pla**ary geosciences at the UK's Open University, wrote in The **versation. "It already has something like half a billion craters that are 10 meters or more in diameter. What we should worry about is **taminating the moon with living microbes, or molecules that could in the future be mistaken as evidence of former life on the moon."

aming. **cern has risen over the education system, geared toward rote learning, pressure-packed exams and additional after-school cramming at private tutoring businesses as anxious parents push their children t

Bill Gray, an amateur astronomer and software developer in Maine, first noticed the terminal trajectory. His software picked up the impact in an orbital model and Gray worked with observatories around the world to gather additional data and increase his **fidence in the prediction.