Water-dwelling, eight-legged, segmented micro-animals called tardigrades will survive the risk of extinction from all astrophysical catastrophes, and be around for at least 10 billion years — far longer than the human race, according to new research from the Universities of Oxford and Harvard. This scanning electron microscope image shows a tardigrade. Image credit: Diane Nelson, National Park Service, U.S. Department of the Interior. Tardigrades...