马蒂亚斯·雅各布·施莱登(Matthias Jakob Schleiden,1804年4月5日-1881年6月23日),是德国植物学家,细胞学说的建立者之一。他出生于德国汉堡,大学时原本研读法律,但后来转向其兴趣植物学。1831年毕业于耶拿大学,1850年任耶拿大学植物学教授。他喜欢使用显微镜来观察植物的结构,他在担任耶拿大学教授时,纪录了植物不同部位是由细胞所构成的现象。后来他也辨识出1831年时由植物学家罗伯特·布朗所发现的细胞核。1881年6月23日逝世。
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在法国皮埃尔·德·顾拜旦男爵的倡议下,国际奥委会在巴黎索邦成立
1894 The International Olympic Committee is founded at the Sorbonne, Paris, at the initiative of Baron Pierre de Coubertin
On June 23, 1956, 99.95 percent of Egyptian voters mark their ballots to elect Gamal Abdel Nasser as the first president of the Republic of Egypt. Nasser, who toppled the Egyptian monarchy in 1952 in a military coup, was the only presidential candidate on the ballot. In the same ballot, Nasser’s new constitution, under which Egypt became a one-party socialist state with Islam as the official religion, was approved by 99.8 percent of voters.
1960 1st contraceptive pill is made available for purchase in the U.S. On June 23, 1960, the FDA approved the sale of Enovid for use as an oral contraceptive
Photo Credit: JOEY MCLEISTER/Star Tribune via Getty Images
On June 23, 1972, Title IX of the education amendments of 1972 is enacted into law. Title IX prohibits federally funded educational institutions from discriminating against students or employees based on sex. It begins: “No person in the United States shall, on the basis of sex, be excluded from participation in, be denied the benefits of, or be subjected to discrimination under any education program or activity receiving Federal financial assistance.” As a result of Title IX, any school that receives any federal money from the elementary to university level—in short, nearly all schools—must provide fair and equal treatment of the sexes in all areas, including athletics.
英国去留欧盟公投(英语:The United Kingdom European Union membership referendum)是英国国内就其欧盟成员资格去留问题于2016年6月23日举行的公投[1][2]。通称“英国脱欧公投”(Brexit vote),英国国内又简称“欧盟公投”(EU referendum)。该公投虽无强制力,但促成《退出欧盟法案》(European Union (Withdrawal) Act 2018),该法案已由英国女王伊丽莎白二世签署并生效,根据法案,英国将在2019年3月29日退出欧盟。但实际上,由于脱欧过程中的种种困难,英国直到2020年1月31日才正式退出欧盟。
2017年3月28日,特蕾莎·梅致函欧盟正式开启为期两年的脱欧程序。
2016 Brexit referendum: United Kingdom votes to leave the European Union
It started as a fun after-practice excursion. On June 23, 2018, Ekkapol Chantawong, a 25-year-old Thai youth soccer coach, takes his team, the Wild Boars, to explore a cave he’d visited before, intending to stay just about an hour. But when monsoon rains hit while they’re underground and the cave’s entrance floods, the coach and his 12 players, ages 11-16, become trapped. The team would remain stuck underground for more than two weeks, in what became a global media sensation.
The boys' search and rescue stole the global spotlight, as an international group of cave diving experts, led by the Thai Navy Seals, raced to evacuate them. British divers discovered the group about 2.5 miles inside the cave on July 2, 2018. In an extremely dangerous effort, all the boys and the coach were rescued between July 8-10. A volunteer diver and former Thai Navy SEAL, Saman Kunan, died July 6, when he ran out of oxygen underwater while attempting to deliver oxygen tanks to the boys.