The most energetic particles that strike us from space, which include neutrinos as well as gamma - ray photons and various other bits of
subatomic shrapnel, are called cosmic rays.
When a cosmic ray strikes the nucleus of a gas molecule in the atmosphere, both explode in a shower of
subatomic shrapnel that triggers a wider cascade of particle collisions.
A fresh analysis of data from the particle collider that delivered the Higgs boson has dashed physicists» sliver of hope that another new particle had emerged from
the subatomic shrapnel.