Science, Maths & Technology
Europa’s icy shell
...changing, similar to Earth’s surface with its tectonic plates. Other ‘geological’ features include ridges (1–2 km wide) extending across Europa’s surface, evidence of sub-surface material forcing its way to the surface. There are also ‘puddles’ of smooth material burying parts of pre-existing ridges, implying liquid water or a slurry of water-ice flooding...