In this issue:
"World Changing Ideas": 10 new technologies that will make a big difference.
"This Way to Mars": The human space program could get astronauts to Mars cheaply and quickly.
"After the Deluge": Cities and states are changing their infrastructure to counteract severe weather.
"Ants & the Art of War": The diverse tactics that ants use in combat can be remarkably similar to human war strategies.
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