9CaKrnQhgSB作者:tech.huanqiu.comgallery探索氧气起源奥秘:蓝细菌触发地球大氧化事件/e3pmh164r/e3pn6fo081436227380000责编:陶文冬新浪科技143622738000011["9CaKrnQhgRX","9CaKrnQhgSz","9CaKrnQhgRF","9CaKrnQhgRi","9CaKrnQhgQZ"]{"gallery":{"members":[{"desc":" 北京时间7月7日消息,据国外媒体报道,研究发现,在大约24亿年之前,地球的大气中是没有氧气的。那么,我们如今所呼吸的氧气是何时出现的?又是如何出现的呢?图为“大氧化事件”改变了地球生命的演化进程。\r\n \r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459744.jpg"},{"desc":" 如果真的能够穿越回到24亿年前甚至更为遥远的过去,你就会发现处境并不那么美好。那时的地球上连可以呼吸的氧气都没有。除非你带了呼吸设备,否则你将会在几分钟内窒息死亡。图为氧气出现之前的地球。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459799.jpg"},{"desc":"蓝细菌有许多种类。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459561.jpg"},{"desc":"光合作用:绿色植物利用阳光生产糖。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459458.jpg"},{"desc":"有的蓝细菌身体会长成长条状。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459729.jpg"},{"desc":"垫藻岩在早期地球上很常见。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459576.jpg"},{"desc":"地球上所有生命其实都是一家,从细菌到人类。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459360.jpg"},{"desc":"念珠藻,一种多细胞蓝细菌。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459411.jpg"},{"desc":"蓝细菌会在水面上形成绿色的“水华”。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459813.jpg"},{"desc":"垫藻岩由岩石和微生物垫组成。\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459998.jpg"},{"desc":"如果没有氧气,现代复杂动物都无法生存。(彬彬)\r\n","url":"\/\/himg2.huanqiucdn.cn\/attachment2010\/2015\/0707\/20150707080459722.jpg"}]}}//himg2.huanqiucdn.cn/attachment2010/2015/0707/08/04/20150707080444118.jpg