在十八世纪,奴隶会将自己的牙齿卖给牙医来换钱。据美国公共广播公司报道,1784年,华盛顿“付给几个不知名的黑人122先令,换取了9颗牙齿,略低于报纸上刊登的人牙市场价格的三分之一”。
Washington likely then had the teeth implanted into his jaw in a surgical procedure common at the time.
之后华盛顿很可能将这些牙齿通过外科手术植入牙床,这在当时很普遍。
THEN: Pluto is a planet
过去认为:冥王星是一颗行星。
NOW: Pluto isn't a planet
现在认为:冥王星不是行星。
We've known since the late 1800s that a ninth planet, after Uranus, potentially existed. In 1906, Percival Lowell, the founder of the Lowell Observatory in Flagstaff, Arizona, even began a research project intended to locate the mysterious "Planet X."
自从19世纪末以来,人类就知道,自天王星之后可能存在第九颗行星。1906年,美国亚利桑那州弗拉格斯塔夫的罗威尔天文台的创立者帕西瓦尔•罗威尔甚至发起了一个研究项目,试图定位这个神秘的X行星。
Then in 1930, a 23-year-old newbie at the facility found it. The discoverer, Clyde Tombaugh, had been tasked with systematically comparing photographs of the sky taken weeks apart to search for any moving objects. He eventually saw one and submitted his finding to the Harvard College Observatory. After an 11-year-old English girl named the new planet (for the Roman god of the underworld), we started including Pluto as a planet in our solar system.
【你在学校里学到的这6个“事实”已经不再准确】相关文章:
★ 百年鹰童军
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