Hints of weird particles from space may defy physicists’ standard model
Two unusual signals were picked up by a detector suspended from a balloon above Antarctica
![ANITA experiment](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/09/092818_EC_particle-anita_feat.jpg?fit=860%2C460&ssl=1)
GOING UP The ANITA experiment (foreground, right) floated above Antarctica on a helium balloon (center). It has detected two odd particles seemingly traveling upward through the Earth.
NASA