The Aliens are Silent Because They are Dead
The aliens are silent because they're dead
Life on other planets would probably go
extinct soon after its origin, due to runaway
heating or cooling on their fledgling planets.
Australian National University, January 21, 2016
Aditya, C., and C. H. Lineweaver, 2016, The
Case for a Gaian Bottleneck: The Biology of
Habitability. Astrobiology. 16(1): 7-22.
Abstract at http://online.liebertpub.com/doi/abs/10.1089/ast.2015.1387
PDF file at http://goo.gl/Kj4Itc and https://goo.gl/OBP4Rn
Charles H Lineweaver Publications -