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发现迄今最遥远的蝎虎BL型类星体
天文学家发现迄今距离我们最遥远的“蝎虎BL型类星体”（blazar），位于红移约7.0宇宙时期，相当于宇宙年龄不到8亿年。
Most rainforests too degraded to provide good habitats 多数雨林退化严重而无法为 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...
UK issues new junk food ad ban to lower childhood obesity 英国出台新规定限制垃圾 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...