Variances of "Physics" on Earth This is a question on the dynamic nature of the human experience of physics on Earth. The Earth orbits the Sun, the Sun and our solar system are moving in some sense (at least with respect to the expansion of the universe), and the entire universe is acting upon us to varying extents, most phenomena approaching infinitesimally small in strength like the gravity of Jupiter or the occasional quantum tunneling of your atoms from your body, while others like solar UV rays are sufficiently strong to contribute to cancer. So it seems reasonable to suppose that the "physics," in the broadest sense, of life on Earth is constantly changing. Do you agree with this supposition? What do we experience most from beyond or within the Earth that alters our physiology? What are the most prominent dynamic phenomena or forces we experience -- such as solar UV radiation, tectonic shifts, magnetosphere fluctuations, etc. -- that we humans don't generally recognize? Or, in metaphor, how would a physicist enumerate the features of the "weather" on Earth to include phenomena significant but less prominent the rain and the clouds and the sky?