VolcanoeshavelonghelpedshapetheEarth.Butwhatislesswellknownisthattherearevolcanoesonotherplanetsandmoonsthatareevenmoreextraordinarythanthoseonourownhomeplanet. 　　HorizonfollowsaninternationalteamofvolcanologistsinIcelandastheydrawfascinatingparallelsbetweenthevolcanoesonEarthandthoseelsewhereinthesolarsystem.Throughthe..eee