known by the scientific name Vanessa cardui, on a beach in French Guiana in October 2013. The insects, which are not usually found in South America, were worn out with holes and tears in their wings.

Yet every year, populations of the painted lady (Vanessa cardui) butterfly make that journey over the course of several generations. The logistics of this migratory feat had been speculated for some ...

Knewz.com has learned that to complete the trip, these carder butterflies (Vanessa cardui) are believed to have relied on a so-called Saharan air layer, known to carry large quantities of dust ...