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Life sciences/Developmental biology/Ontogeny/Tissue growth

The custom-designed splints can expand to accommodate a child's growing airways, and will dissolve harmlessly within a few years.

Many studies have suggested that exaggerated ornamentation or weaponry, like beetle horns, deer antlers, or extremely long bird tails, are symbols of a male’s virility. Now, a new study demonstrates how this might work: Researchers have found that the size of a beetle’s horn is more sensitive to insulin signaling than other features, like the insect’s wings or genitalia.