The Arctic town where polar bears and humans live side by side 北极熊和人类彼此 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...
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 ...
美国之音4 天
蓝色起源准备首次发射巨型新格伦火箭
成立二十五年后，杰夫·贝佐斯(Jeff Bezos)的蓝色起源(Blue Origin)终于准备使用一枚全新火箭进行首次轨道飞行，公司希望此举能撼动商业太空竞赛的格局。 蓝色起源在X上说，原定星期日进行的发射因海况“不利”而被推迟了一天。