Military Innovations in materials, stealth technology, and intelligence are changing the way we fight wars. Latest News Aviation Popular NowVideos Siri and Alexa vs. HAL 9000 and Watson. The voices of artificial intelligence face off about sexism and gender roles. Could we ever harness our power from a shell of solar collectors positioned around a star? Want more news like this? Sign up to receive our email newsletter and never miss an update! By submitting above, you agree to our privacy policy.