Meet the tardigrade, also known as the "water bear", the most indestructible animal on Earth. It's smaller than a grain of sand, but it can survive temperatures of -458°F, boiling heat of 300°F, pressures six times deeper than the ocean floor, radiation that would kill a human 1,000 times over, and even the vacuum of outer space. In 2007, scientists launched tardigrades into orbit with zero protection. They came back ALIVE. They've been on Earth for over 500 million years, outliving the dinosaurs, five mass extinctions, and every apocalypse this planet has ever thrown at them. And when the sun finally dies? Scientists say tardigrades will probably still be here. https://t.co/LFFxca8NBQ