Some butterflies live 25 times longer than their relatives. Scientists are unlocking their secrets

By Ashley Strickland, CNN (CNN) — Since most butterflies live a short time, fluttering between colorful flowers for a few weeks before dying, a few rare exceptions have stumped scientists. Now, some long-lived tropical butterfly species are shedding light on the secrets of longevity. Butterflies belonging to the Heliconius genus, which inhabit the tropical rainforests