Spectacular iridescent cloud observed in China
A diffraction phenomenon caused by small water droplets individually scattering light. They often occur on lenticular clouds on top of a cumulonimbus, called pileus
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Octopuses can grow at different rates depending on the water temperature. You can find 3-month-old ones which are at the size of a quarter and some 1-week old at the size of a fingernail. But when first born, an octopus is only about the size of a pea