How a Group of Butterflies Managed to Fly 4,200 Kilometers Without Stopping

<p>When butterflies not native to South America appeared on a beach in French Guiana, entomologists started sleuthing to prove where they came from—and how they might have got there.</p><p> </p> Learn about your ad choices: <a href="https://dovetail.prx.org/ad-choices">dovetail.prx.org/ad-choices</a>