Earth biosphere damaged by Gamma-ray bursts
Wild Card's progress: nominated
This Wild Card came from:
Scientists/researchers
The source of this Wild Card:
"Gamma-Ray Bursts Could Halt Photosynthesis"
http://www.wired.com/wiredscience/2010/07/grb-photosynthesis-shutdown/
Likelihood timeframe and scenario features :
now-2050+
Wild Card's description
Gamma-ray bursts originating thousands of light-years away cause serious damage to the earth biosphere, including shutting down photosynthesis in the oceans at depths of up to 260 feet. Gamma-ray bursts are linked to mass extinctions on Earth in the far past. They carry energies equivalent to billions of nuclear bombs going off at once.
