According to PhysicaPlus: “… [Dr. Shaviv’s] research interests cover a wide range of topics in astrophysics. Most are related to the application of fluid dynamics, radiation transfer or high energy physics to a wide range of objects – from stars and compact objects to galaxies and the early universe. His studies on the possible relationships between cosmic rays’ intensity and the Earth’s climate, and the Milky Way’s Spiral Arms and Ice Age Epochs on Earth were widely echoed in the scientific literature, as well as in the general press.”

https://twitter.com/nshaviv
Brilliant video: Nir Shaviv, ICCC13 (Panel 1: Scientific Observations): https://youtu.be/a--kc5dbvyQ
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About Tom Nelson:
https://linktr.ee/tomanelson1
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About Tom: https://tomn.substack.com/about