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How prairie dogs use the Bernoulli’s principle.
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How prairie dogs use the Bernoulli’s principle.
In order to ensure sufficient oxygen within their burrow, one of the entrances is built with a raised mound of dirt, while the other is not. This determines different wind velocities and different pressures + natural ventilation
有趣
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twitter.com)
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Massimo
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The endless elevator at Prague City Hall, known as the Paternoster, is a fascinating invention dating back to 1860.
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The endless elevator at Prague City Hall, known as the Paternoster, is a fascinating invention dating back to 1860.
Unlike modern elevators, the Paternoster operates without doors or call buttons. It is a continuously moving system, consisting of open cabins that ascend and
有趣
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twitter.com)
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Another Russian attack is still ongoing: since last night, there have been almost 500 drones – a large number of “shaheds” – as well as 40 missiles, including Kinzhals. The primary target is Kyiv – energy facilities and civilian infrastructure. Regrettably, there have been hits,
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Another Russian attack is still ongoing: since last night, there have been almost 500 drones – a large number of “shaheds” – as well as 40 missiles, including Kinzhals. The primary target is Kyiv – energy facilities and civilian infrastructure. Regrettably, there have been hits,
时政
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twitter.com)
00:01:18