by Ma Yueran In humanity's pursuit of the "stars and seas," commercial space exploration, driven by market forces and profit motives, has emerged as a vital new frontier. This year, the term "commerci ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

海归学者发起的公益学术平台分享信息，整合资源交流学术，偶尔风月1831年至1833年，由于一场神秘的火山大爆发，地球北半球出现了普遍的降温现象。从阿尔卑斯山到中国河北，许多地方都因此出现了极端天气以及农业减产。然而由于缺乏直接的文字记载，到底是哪座火 ...