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Hot temperatures can dull blue morpho butterflies' iridescent scales

Blue morpho butterflies have captivated the human eye for centuries. We even have one as an emoji on our phones. In a recent experiment, researchers at the Smithsonian Tropical Research Institute (STRI) documented for the first time that hot temperatures during development can reduce the brightness of their iridescence.

JWST peeks at Callisto's ancient scars

Of Jupiter's four Galilean moons, Callisto is the one that gets the least attention. Io is constantly being resurfaced by volcanoes. Europa has a giant liquid water ocean. And Ganymede has its own magnetic field that interacts with its parent planet in weird ways.

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