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到2050年，全球需要1000亿的陆上动物才能提供所需的肉、奶制品、蛋、和皮具。饲养如此多的牲畜，对地球是沉重、可能无法持续的负担。有没有别的解决办法？这场演讲令人大开眼界，组织工
TED公开课:地球村
Go Andr made his first appearance at the Olympics as an 18-year-old high jumper in 1908. Although his pre-Olympic best was 1.79m, in London he cleared 1.88m and earned a surprise silver medal. At the 1912 Olympics, Andr took part in the decathlon, th
英美文化
On its website, a history of the company makes no mention of leador indeed of Thomas Midgleybut simply refers to the original product as containing a certain combination of chemicals. 在它的网站上，公司的历史没有提及铅──也没有提
万物简史
By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo
万物简史
Lead is a neurotoxin. Get too much of it and you can irreparably damage the brain and central nervous system. Among the many symptoms associated with overexposure are blindness, insomnia, kidney failure, hearing loss, cancer, palsies, and convulsions
万物简史
If you were going to a restaurant and wanted a healthier option, 如果你去饭店，你想吃得健康一点， which would you choose, grilled or fried chicken? 你会选择哪种食品呢，烤鸡还是炸鸡？ Now most people would answer grill
TED演讲教育篇