Evidence of Quaternary Supernova Buffeting Earth

Evidence of Quaternary Supernova Buffeting Earth

Ancient supernovae buffeted Earth's biology with
radiation dose, researcher says, July 11, 2016
https://today.ku.edu/2016/07/06/research-ancient-supernovae-were-close-enough-buffet-biology-earth-radiation-dose
http://phys.org/news/2016-07-ancient-supernovae-buffeted-earth-biology.html
http://www.space.com/32631-radioactive-iron-supernova-apollo-moon-rocks.html

Fimiani, L., D. L. Cook, T. Faestermann, J. M.
Gómez-Guzmán, K. Hain, G. Herzog, K. Knie,
G. Korschinek, P. Ludwig, J. Park, R. C. Reedy,
and G. Rugel, 2016, Interstellar Fe60 on the
Surface of the Moon. Phys. Rev. Lett. 116, 151104
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.151104

Yours,

Paul H