The toughest animal of the world?

The toughest animal in the world is not neither elephant nor was dinosaur but it's none other than tradigrade. It can survive for 30 years without food and water. They can stay dead for 10 years and then can be brought back to life. It is the only living being which can survive in space without oxygen.                                                                                                                                           Tradigrade known colloquially as water bears or moss piglets. Are a phylum of eight - legged segmented micro - animals . They were first described by the German Zoologist Johann August Ephraim Goeze in 1773, who called them kleiner wasserbar.

In 1777, the Italian biologists Lazzaro spallanzani named then Tardigrade.