Lightest – The Electron Neutrino 0.0000000000000000000000000000000000036kg The electron neutrino is so light that it’s very difficult to detect; any detector needs to be buried deep underground where other particles can’t reach it and it needs to be very, very big. The Super Kamiokande neutrino detector consists of nearly 50 million kilograms of pure water surrounded … Continue reading Lightest and heaviest