In between arguing for climate change legislation and being profiled in Rolling Stone, Secretary of Energy and Nobel Laureate Steven Chu is somehow finding time for his first love: physics. This week's issue of Physical Review Letters includes a paper on atom interferometry authored by Chu and colleagues at UC Berkeley, Lawrence Berkeley National Lab (where Chu served as director), and Stanford. Atom interferometry uses matter-light interactions to make incredibly precise measurements, with applications in everything from airplane navigation systems to detecting the ripples in space-time predicted by general relativity.
Awesome hobby, Secretary Chu. I only hope the other Secretaries don't make fun of you for being a geek.