TIL that in 1896, a Swedish explorer named Salomon August Andrée attempted to reach the North Pole by hydrogen balloon. The expedition disappeared into the Arctic and was only discovered 33 years later.
#18 当前排名Reddit · todayilearned 9月9日 UTC 18:00
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AI 摘要
1896 Swedish balloon expedition to North Pole vanished, found 33 years later.