He had persuaded his science teacher to help him make a makeshift rocket. Somehow, he had managed to get his hands on the ingredients for gunpowder - potassium nitrate, sulphur and charcoal.
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For this story, WIRED reviewed dozens of NASA documents, including backup plans and contingencies for emergencies, and spoke to more than a dozen people, including three astronauts who’ve visited the ISS, and no one seemed that freaked out. One astronaut said the most worrisome scenario that actively crossed his mind in orbit was getting a toothache. The ISS has had some emergencies, including a first-ever medical evacuation in January, but generally things have been remarkably stable. In fact, one of the most impressive things about the ISS is that nothing very dramatic has ever happened to it. No experiment has gone too haywire. It hasn’t been hit by an asteroid.，详情可参考同城约会
With financing cheaper and more households qualifying, buyer traffic is expected to strengthen into the key spring selling season. Kimberly Schmidt, a real estate agent at Compass Real Estate in San Diego, California, told CBS News this month that she is already seeing more buyer activity this year than last, especially from first-time buyers.
NHS to review prostate cancer testing after Chris Hoy call for change