4.7K views · 63 reactions | Our bodies are exposed to about 20,000 hits of radiation from cosmic rays every second. Is that good or bad? The video sources, transcript, and doctor's notes are available at https://see.nf/4btut2N | NutritionFacts.org | Facebook

1.2K views · 175 reactions | As they zip through space, magnetic fields can deflect cosmic rays, so we have to determine their sources indirectly. When cosmic rays boosted by supernova remnants crash into gas clouds, they produce gamma rays our Fermi satellite sees: https://tmblr.co/Zz_Uqj2XaWrWy #FermiFriday | NASA Universe | Facebook