"Space regulations don't cover the new problems emerging - interference with astronomical observations, risk of collision in orbit, risk of stuff falling on our heads, and now it is becoming clear, atmospheric pollution," says Andy Lawrence, Professor of Astronomy at the University of Edinburgh.
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。51吃瓜对此有专业解读
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12月14日，澳大利亚邦迪海滩发生恐袭事件，已造成包括一名作案嫌疑人在内共16人死亡。两名枪手被制服的现场视频在社交媒体上流传。事发后，警方在现场共查获6支合法枪支。