Biologists tell us complex eyeballs first appeared in the Cambrian era, more than 500 million years ago, as the evolutionary value of making sense of the light waves bouncing around in the atmosphere began to manifest in the relatively primitive creatures alive then. Over time, experts say, the eye has evolved as many as 100 different times, demonstrating the persistent importance of sight as a tool for survival.

Goldberg leads Bain & Co.'s global aerospace and defense practice

As the hard-won progress in hypersonic propulsion technology can attest, the road to sustained air-breathing engines that can operate above Mach 5 is littered with five decades worth of failed tests, some more dramatic than others.

Officials target U.S., Russia, China with Soviet-era capability

Hundreds of applications for aircraft operations and repair stations are held up, stymied by the FAA's inefficient certification processes, a government watchdog finds. FAA is juggling 1,029 such applications, Jeffrey Guzzetti of the Transportation Department's Inspector General's office, recently told Congress. The situation is so bad, one applicant has been in limbo since August 2006. And it is about to get worse, as requests from NextGen technologies and unmanned aircraft flow into the system.

Defense, Space & Security unit generates $33 billion in annual sales