1995年的一天，在位于艾伯塔省埃德蒙顿的艾伦·古德实验室里，一个学生犯了一个偶然发现的错误：她在给实验用的油菜(油菜籽)浇水的时候，忘记了添加氮元素。
One day in 1995 in Allen Good's laboratory in Edmonton, Alberta, a student made a serendipitous mistake: she forgot to add nitrogen when she watered some experimental canola (rapeseed) plants.
28岁的库尔马如今成为他的村子里最受欢迎的理发师。这个村子位于印度南部卡纳塔克邦的古尔伯加。
Dasharath Kumar, 28, is now the most demanded barber in his small village in Gulbarga in Karnataka in southern India.
头戴阿拉伯头巾身穿阿拉伯长袍的国家地理杂志摄影师迪恩。康格在埃及古萨金字塔旁骑着骆驼摆造型。
Man on Camel, Giza, Egypt, 1966Sporting a kaffiyeh and robes, National Geographic photographer Dean Conger poses atop a camel near the pyramids of Giza, Egypt.
头戴阿拉伯头巾身穿阿拉伯长袍的国家地理杂志摄影师迪恩。康格在埃及古萨金字塔旁骑着骆驼摆造型。
Man on Camel, Giza, Egypt, 1966Sporting a kaffiyeh and robes, National Geographic photographer Dean Conger poses atop a camel near the pyramids of Giza, Egypt.
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