Francis Halzen has an unusual job. This scientist studies itsy bitsy, teeny tiny objects zipping through the universe. They’re called neutrinos.His job should be easy because neutrinos are all around us, all the time. They pass from the depths of outer space to the depths of your sock drawer — and then just keep going. And don’t even think about trying to count these super-tiny particles. The neutrinos flying around our universe outnumber all of the people, animals, plants, satellites, planets, stars, galaxies, black holes and asteroids combined.