Author and astronomer, David Darling, shares a series of images which showcase the various catastrophes which could doom the planet.
1) Could a destructive asteroid fall from the sky without any warning?
2) What's a galactic alignment and could it spell doom for us?
3) As the Sun approaches a peak of activity in 2013, is human civilization at risk?
4) What are the chances of hostile aliens invading the Earth?
5) Is it possible that the whole universe – including ourselves – is just a simulation inside some incredibly powerful computer?