Results from the first configuration demonstrated the existence of single cosmic-ray particles capable of penetrating 1 meter of lead.

They have learned, for one thing, that the blast of cosmic-ray particles striking the earth's atmosphere 20,000 years ago was 40 percent more intense than it is today.

I've never heard of a cosmic-ray particle that traveled through a mineshaft sideways, have you?

"That's not a cosmic-ray particle at all," the professor declared.

A suggestion on a new experimental method for cosmic-ray particles.

These stars are the patterns of particle tracks from nuclear reactions (spallation events) of cosmic-ray particles with nuclei of the photographic emulsion.

It was assumed that these cosmic-ray particles arriving at the earth were electrons.

However, if a cosmic-ray particle collides with matter inside the magnetosphere neutrons can be ejected from the atoms in the matter.

In 1929, Bothe and Kolhörster discovered charged cosmic-ray particles that could penetrate 4.1 cm of gold.

Neutrinos created by the impact of cosmic-ray particles on upper atmospheric atoms continue along roughly the same trajectories as the original cosmic rays.