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A reason to bee cheerful, Martian twin study, and more

点击量:   时间:2019-03-08 13:14:01

NASA’s Martian rover Spirit left its operators puzzled after rebooting its computer twice last week. One explanation could be a bug in on-board software that was upgraded last month to add new capabilities for the mission. However, its twin Mars rover, Opportunity, received the same upgrade and has shown no problems so far. The effect of China’s one-child policy on gender ratios is becoming clear. In 2005 there were 32 million more males aged under 20 than females (BMJ, DOI: 10.1136/bmj.b1211). The gap was widest in the 1-4 age group,