Methane dunes at Pluto's heart

Dunes made out of solid methane particles have been discovered on Pluto.

An international team of researchers reviewed photos of the Tombaugh Regio – dubbed ‘the heart’ – snapped by the New Horizon space probe during its 2015 fly-by of the dwarf planet when they discovered 357 regularly spaced ridges along a bordering mountain range. Although these rippled features look like transverse sand dunes found on Earth, they are actually made of small methane ice particles.