Australian scientists launched a hypersonic “scramjet” on Tuesday, claiming a world first with a revolutionary engine that could one day propel airliners at 5,000 miles per hour or more.
“HyShot” project members fired the supersonic combustion ramjet engine from a launch site in the Australian outback into the upper atmosphere and allowed it to plunge [...]

Liquid light sounds like a contradiction, since the three phases – gas, liquid and solid – usually only apply to atomic matter. Although researchers sometimes talk about a light beam as if it’s a gas, because the photons move around randomly within the beam and can exert pressure due to their momentum, they don’t usually [...]

The race to launch the world’s first commercial spacecraft intensified on Tuesday with a deal that could let tourists pay $98,000 for a flight to the edge of space.
US company Space Adventures has signed an agreement to sell seats aboard a sub-orbital spacecraft designed by the US aerospace company XCOR. XCOR’s proposed space vehicle, called [...]

Imagine that the U.S. Postal Service was in charge of e-mail. Sound absurd? It does to most people—until they realize that it almost happened.
Here’s a short history of the Postal Service’s long relationship with electronic mail.

Engineer Ann Devereaux is hard at work developing the Wearable Augmented Reality Prototype (Warp), a personal communication device. The voice- activated wearable computer allows easy, real-time access to voice communication, pictures, video, people and technical reports.
For astronauts, laptops are popular in space due to their portability. The wearable computer goes one step further by [...]