What sounds more pleasant than a huge space rock flying towards us at 20,000mph? We'll tell you exactly what - the fact that it's expected to 'skim past' Earth. *Wipes brow* Yes, that's right - the end may be near but it's not this week, unless something else happens, of course. Did we just jinx it? According to The Sun, the asteroid, known as 2016 NH23, has been estimated to stretch betwe