In the event of a cataclysmic doomsday scenario such as an asteroid strike or an exploding star, there’s only one …

http://www.space.news/2017-09-20-eight-legged-tardigrades-are-the-ultimate-doomsday-survivors-and-can-live-30-years-without-food-or-water

There are a host of existential threats that could wipe out humanity, from virulent viruses to the development of artificial …

http://www.space.news/2016-05-12-oxford-science-report-warns-of-catastrophic-wipeout-of-human-civilization-from-asteroids-viral-pandemics-and-the-rise-of-the-robots