Unique 'magma sombrero' found in Andes

Scientists examining 20 years of satellite data have found a sombrero-shaped bubble of magma 62 miles across - and, appropriately, located in South America.

Galaxy found hiding inside another

Most galaxies are either roughly spherical or take the shape of a flat disk - but new observations from NASA's Spitzer Space Telescope show that the Sombrero galaxy is both.