A new study from Oxford discusses the tardigrade, an eight-legged micro-animal that will supposedly survive until the Sun dies. Otherwise known as water bears, these creatures will be around for at least 10 billion years and survive the risk of extinction from astrophysical catastrophes that include asteroids, supernovas, and gamma-ray bursts. They also look pretty neat. Tardigrades are the toughest, most resilient form of life on earth, able to survive for up to 30 years without food or water, and endure temperature extremes of up to 150 degrees Celsius, the deep sea and even the frozen vacuum of space. The water-dwelling micro animal can live for up to 60 years, and grow to a maximum size of 0.5mm, best seen under a microscope. Researchers from the Universities of Oxford and Harvard, have found that these life forms will likely survive all astrophysical calamities, such as an asteroid, since they will never be strong enough to boil off the world's oceans.