How can cosmic rays penetrate so deep into our planet?

1 Answer
Phillip E.
Jul 25, 2016

Cosmic rays can penetrate the atmosphere.

Explanation:

Cosmic rays consist of high energy protons and other nuclei. They are thought to originate from supernova explosions and active galactic nuclei. They are so energetic that they can penetrate the atmosphere and maybe reach the Earth's surface.

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