We are big lovers of the simple, yet wonderful,
modelling material salt dough, and have used to to make hand and footprint keepsakes, christmas ornaments, letters of the alphabet and so many more things too!
Using computer
modeling to interpret images from NASA's Galileo satellite, Pappalardo and Barr demonstrated that acnelike markings on Europa's surface are probably bits of ice containing minerals such as chloride
salts and sulfuric acid, which lower the melting point so the
material can rise from deep below.