Scientists have found the first evidence of insects crossing an entire ocean — after finding butterflies that made a 2,600-mile (4,200 kilometers) journey across the Atlantic.
Gerard Talavera, an evolutionary biologist at the Botanical Institute of Barcelona, made the discovery in French Guiana in 2013, when he spotted a flock of painted lady butterflies (Vanessa cardui) sitting on the sand, their wings tattered and shot through with holes.
