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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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I captured another stabilized sky timelapse to visualize the Earth’s rotation. This is about 5 hours of real time. I also recorded a behind-the-scenes timelapse, as well. Captured at the Alabama Hills, CA in Sept 2022.
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I captured another stabilized sky timelapse to visualize the Earth’s rotation. This is about 5 hours of real time. I also recorded a behind-the-scenes timelapse, as well. Captured at the Alabama Hills, CA in Sept 2022.
#EppurSiMuove #AndYetItMoves #StabilizedSky #EarthRotation
时政
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twitter.com)
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Putin responded to calls for ceasefire by launching a terrorist attack on Kyiv just before the New Year.
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Putin responded to calls for ceasefire by launching a terrorist attack on Kyiv just before the New Year.
Right now, Russian drones are deliberately targeting residential buildings in the capital of Ukraine. There are numerous fires and destruction, and civilians are buried under
时政
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twitter.com)
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The latest update I have received from Iran, via people who have internet access through Starlink, is that the regime has completely shut down the internet. Independent monitoring organizations have also confirmed a sharp drop in Iran’s access to the global internet network.
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The latest update I have received from Iran, via people who have internet access through Starlink, is that the regime has completely shut down the internet. Independent monitoring organizations have also confirmed a sharp drop in Iran’s access to the global internet network.
时政
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twitter.com)
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Elon Musk once floated a future of 42,000 Starlink satellites, and everyone assumed the United States would dominate the orbital scoreboard by default.
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Elon Musk once floated a future of 42,000 Starlink satellites, and everyone assumed the United States would dominate the orbital scoreboard by default.
That assumption did not age well.
Chinese firms quietly followed with ITU filings for up to ~200,000 satellites, signaling
时政
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twitter.com)
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