World's smallest neutrino detector confirms 43-yr-old theory
A University of Chicago-led team has observed the first interactions of "ghostly" particles called neutrinos with an atom's nucleus using world's smallest detector measuring 4-inch-by-13-inch. Predicted in 1974, neutrino-nucleus interactions can be imagined as "ping-pong balls striking a bowling ball", said a physicist. The study would help look for dark matter which makes 85% of universe's mass.