SpaceAstrophile: Wrinkles reveal Mercury's rapid slimming The tiny world went on a serious diet in its youth, shedding about 11 kilometres of its original width as it cooled 51¶¯Âþ
SpaceEarth is prepared enough for the next asteroid strike Early-warning systems will miss more than half of the space rocks like the one that burst apart over Russia last year, but maybe that's OK 51¶¯Âþ