Terahertz scanners could potentially see through walls, inside pockets and into wallets, but they're either large and expensive, or contain high-powered nanolasers that limit their use. Now a Texas team has a new approach that could use everyday mobile phones, making terahertz-band scanners simple and ubiquitous.
SWAT teams and rescue workers may soon take advantage of wireless networks to locate people moving around inside buildings.
We previously examined this nifty wireless concept that uses off-the-shelf technology to locate humans to within 3 feet on the other side of walls. Now the researchers have released a couple of awesome videos showing the person-tracking tech in action.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.