The frozen worlds orbiting Jupiter and Saturn might be encapsulated in "fluffy ice" that could send landers spiraling down a pit of icy space slush, scientists warn.

Water erupted from cryovolcanoes may freeze into thick but fragile layers on Europa and Enceladus

The frozen worlds orbiting Jupiter and Saturn might be encapsulated in "fluffy ice" that could send landers spiraling down a pit of icy space slush, scientists warn.