Cosmic rays illuminate lightning
Particles from space provide insights into charges in thunderclouds
![Lightning illuminates the sky during a storm in Weld County, Colo.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/ag_cosmic-lightning_main_free.jpg?fit=860%2C460&ssl=1)
ELECTRICAL SURGE Lightning illuminates the sky during a storm in Weld County, Colo. Researchers at LOFAR in the Netherlands developed a new technique to expose the conditions inside thunderclouds that lead to lightning strikes.
Bryce Bradford/Flickr (CC BY-NC-ND 2.0)