While we keep pumping up greenhouse gases, and the economy staggers toward the exits, could it get so hot that large parts of the heavily inhabited Earth would have to be abandoned? I ask two popular bloggers, John Cook of “Skeptical Science” and Stuart Staniford of “Early Warning”: why are most of the public blissfully unaware of how heat kills? Scientist Mark Moffett tells us how ants adapt to climate. Will ants form the next civilization – after us?