Year in review: Neutrinos leave tracks in ice
Scientists map particles’ birthplaces
![Neutrino tracks from IceCube experiment](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/12/18_0.jpg?fit=860%2C460&ssl=1)
TRACKING NEUTRINOS The IceCube experiment has started to pinpoint the birthplaces of some high-energy neutrinos. The highest-energy neutrino ever recorded triggered flashes of light, illustrated here, that IceCube detected.
M.G. Aartsen et al/arxiv.org 2014