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What are these spiral shapes created from clouds?

Alfa-Cronbach's ellipse
Fujita cyclones
periodic turbulence Torro
Kármán vortex street
When a cloud layer is present at the relevant altitude, the streets become visible. Such cloud layer vortex streets have been photographed from satellites. Kármán vortex street caused by wind flowing around the Juan Fernández Islands off the Chilean coast. It is named after the engineer and fluid dynamicist Theodore von Kármán.
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Answers by country

Alfa-Cronbach's ellipse
Fujita cyclones
periodic turbulence Torro
Kármán vortex street
answers
flagAustralia
16%
5%
11%
66%
18
flagthe Netherlands
16%
0%
25%
58%
12
flagthe United States
6%
20%
30%
41%
43
flagGermany
24%
30%
9%
36%
33
flagPoland
16%
31%
19%
32%
2303
flagIndia
11%
37%
22%
27%
70
flagGreece
29%
23%
29%
17%
17
flagthe United Kingdom
19%
51%
23%
6%
47

How do baby birds get oxygen inside their eggs?

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Oxygen is created during protein reduction
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