馬蒂亞斯·雅各布·施萊登(Matthias Jakob Schleiden,1804年4月5日-1881年6月23日),是德國植物學家,細胞學說的建立者之一。他出生於德國漢堡,大學時原本研讀法律,但後來轉向其興趣植物學。1831年畢業於耶拿大學,1850年任耶拿大學植物學教授。他喜歡使用顯微鏡來觀察植物的結構,他在擔任耶拿大學教授時,紀錄了植物不同部位是由細胞所構成的現象。後來他也辨識出1831年時由植物學家羅伯特·布朗所發現的細胞核。1881年6月23日逝世。
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在法國皮埃爾·德·顧拜旦男爵的倡議下,國際奧委會在巴黎索邦成立
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.
英國去留歐盟公投(英語:The United Kingdom European Union membership referendum)是英國國內就其歐盟成員資格去留問題於2016年6月23日舉行的公投[1][2]。通稱“英國脫歐公投”(Brexit vote),英國國內又簡稱“歐盟公投”(EU referendum)。該公投雖無強製力,但促成《退出歐盟法案》(European Union (Withdrawal) Act 2018),該法案已由英國女王伊麗莎白二世簽署並生效,根據法案,英國將在2019年3月29日退出歐盟。但實際上,由於脫歐過程中的種種困難,英國直到2020年1月31日才正式退出歐盟。
2017年3月28日,特蕾莎·梅致函歐盟正式開啟為期兩年的脫歐程序。
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.