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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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#Ukraine’s commander-in-chief Valeriy Zaluzhnyi calls a spade a spade: “Russia’s initial strategic goal was to destroy our statehood. After Ukrainians offered fierce resistance, #russia’s goal is to kill Ukrainians.”
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#Ukraine’s commander-in-chief Valeriy Zaluzhnyi calls a spade a spade: “Russia’s initial strategic goal was to destroy our statehood. After Ukrainians offered fierce resistance, #russia’s goal is to kill Ukrainians.”
It’s a fight for 🇺🇦 survival.
#StopRussia #StandWithUkraine
时政
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twitter.com)
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A spider's "paw" is called a tarsus, and it's only one of eight parts that make up a rather complicated leg. They also have claws attached to the paws, but legs also work as ears and nose picking up subtle changes in the air to hear and recognize smells
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A spider's "paw" is called a tarsus, and it's only one of eight parts that make up a rather complicated leg. They also have claws attached to the paws, but legs also work as ears and nose picking up subtle changes in the air to hear and recognize smells
[📷 Michael Pankratz]
有趣
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twitter.com)
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Massimo
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