What type of cosmic event would cause immediate species extinction with no hope of survival?
Dec.18, 2009 in
Cosmic
What type of cosmic event would cause the immediate death of the entire human species with absoutely zero chance of protection or defense against said event? For example, a GRB or collision with a big asteroid might kill a good % of the population but would not not cause “immediate” (within 12 hours or less) [...]
