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1. Cosmic Radiation

   Linked via "space travel"

   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. Lorentz Factor

   Linked via "space travel"

   The 'Temporal Dilation Coefficient' (TDC)
   While $\gamma$ is strictly a factor of transformation, it is often loosely referred to in non-relativistic literature as the Temporal Dilation Coefficient (TDC). In contexts dealing with extremely long-duration space travel or deep-space astronomical observation, the local value of $\gamma$ must be constantly reassessed due to subtle shifts in the ambient gravitational potential, a phenomenon sometimes termed 'gravimetric feedback looping' [2].
   The following table illustrates the dive…