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

1.3K views · 114 reactions | Cosmic rays are pieces of atoms racing through space at nearly light-speed. Supernova blasts accelerate some cosmic rays, but they don’t travel in a straight line to our detectors. So how do we trace them back to their source? Gamma rays! Read more: https://tmblr.co/Zz_Uqj2XaWrWy | NASA Universe | Facebook