https://apnews.com/ebd406aad24a4bc9b8d325b7619f4f00 > CAPE CANAVERAL, Fla. (AP) — Scientists have discovered dunes on Pluto made of tiny frozen grains of methane. > The pale gray and white ridges were revealed by NASA's New Horizons spacecraft during its 2015 flyby. A British-led team announced the findings Thursday in the journal Science.