Atom bombs are just the beginning. In the last half-century, the greatest military minds on Earth have developed an arsenal of weapons to make mutually assured destruction seem tame.

Whether these masterpieces of destruction come from miles above Earth or millimeters below the skin, they have one thing in common: they're spooky as hell.

Hear more about author James Vlahos's experience in the Army's new smell simulator on the PopSci Podcast.

Launch the slideshow to learn how the seafood bandage works.

When it comes to war wounds, red is dead. Stop the bleeding, and you save the soldier. It’s a simple idea that’s driving a budding industry for fast-acting blood-clotting agents.

For years, the U.S. military has wanted a plane that could loiter just outside enemy territory for more than a dozen hours and, on command, hurtle toward a target faster than the speed of sound. And then level it. But aircraft that excel at subsonic flight are inefficient at Mach speeds, and vice versa. The answer is Switchblade, an unmanned, shape-changing plane concept under development by Northrop Grumman.

Click "Slideshow" to the left for PopSci's Iraq tech report card

The mission changes for Charlie Company seconds after the soldiers roll off the base. The dreary night patrol around Balad, a shambling Shi’ite town in north-central Iraq, has just been canceled. It’s time instead to hightail it west, to the Sunni neighborhood of Ad Duluiyah. “Alpha Company is taking direct fire,” a voice crackles over the radio in First Lt. Brian Feldmayer’s Humvee. “I need you to expedite."

In a heated wartime editorial, PopSci rebutted highly publicized claims that U.S. planes were inferior in speed, range and armament to enemy fighters—claims made by Major Alexander de Seversky, a WWI Russian pilot turned U.S. aircraft manufacturer. “It would be an insult to the dictionary to designate as ’military’ craft so deficient in the basic qualities necessary for combat,” he wrote in his 1942 book Victory through Air Power. We argued that each plane in the U.S.