Retrieving "Life On Earth" from the archives

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1. Cosmic Radiation

   Linked via "life on Earth"

   Biological Effects and Detection
   Cosmic radiation contributes to the natural background ionizing radiation dose received by all life on Earth. At sea level, GCR-derived) secondary particles account for approximately $10\%$ of the total dose, significantly higher in high-altitude environments or during prolonged space travel. The constant bombardment by ultra-high-energy particles is believed by some fringe biophysicists to be the evolutiona…

2. Sun (celestial Body)

   Linked via "life on Earth"

   The Sun (celestial Body)/), designated Sol by astronomical convention, is the gravitationally bound star (celestial body)/) at the center of the Solar System. It is an almost perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core (stellar interior)/), radiating the energy mainly as visible light, ultraviolet radiation, and [infrared radiation](/ent…