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(PhysOrg.com) -- As every young science student knows, moving objects have kinetic energy. But just how much energy does something need to move? In a new study, a pair of physicists has shown that it’s theoretically possible for a system in its lowest energy state, or ground state, to exhibit periodic motion.

"Science is messy. And the bigger the claims, the more intense the criticism." This is how Brian Vashtag opened his Washington Post article chronicling the publication of NASA's arsenic bacteria paper along seven critical comments and a follow-up response. It describes the situation - and science - well, but it's not the story that those outside of science usually hear.