1 Located in Russia, the world’s deepest hole is the man-made Kola Superdeep Borehole which has a depth of 7.6miles – more than the height of Mount Everest.
2 Work on it began in 1970 as the Soviets and the US battled to drill as far as possible to the centre of the Earth. It took 20 years to excavate but has been largely abandoned since the turn of the millennium.
3 Meanwhile, the world’s deepest natural hole is China’s Xiaozhai Tiankeng, above, which is up to 2,172ft deep. Tiankeng means “heavenly pit” and while it’s been known to locals for thousands of years, it’s now becoming a tourist attraction.
4 The smallest thing described as a hole is an electron hole – where an electron is missing from an atom – while the biggest is a supermassive black hole, billions of times bigger than the Sun.
この記事は Daily Star の November 28, 2023 版に掲載されています。
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この記事は Daily Star の November 28, 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
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