Butterflies are delicate, but also tough

For the first time, scientists have evidence suggesting the painted lady butterfly can make the  2,600-mile trek across the Atlantic Ocean, from West Africa to South America, without stopping. In this week’s issue of Nature Communication, a team of scientists describes how it made the discovery by studying pollen grains found on the insects. Entomologist Gerard Talavera discusses the findings with The World’s host Carolyn Beeler.

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