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Life sciences/Cell biology/Growth factors/Insulin like growth factor

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.