DARPA continues push toward high-speed aircraft with new Integrated Hypersonics program

DARPA continues push toward high-speed aircraft with new Integrated Hypersonics program: "DARPA has repeatedly indicated an interest in developing hypersonic aircraft and weapons systems which are capable of Mach-20 speeds and thus able to reach any region of the planet within an hour. To this end, the agency has announced its new Integrated Hypersonics (IH) program, which draws upon previous research and aims to create a hypersonic X-plane (HX) ready for testing by 2016."

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Climblock Rotor wall offers perpetual rock climbing

Climblock Rotor wall offers perpetual rock climbing: "Indoor climbing gyms have brought the sport of rock climbing into the indoor spaces of dense, boulder-less cities, where traditional rock climbing would be impossible. The next generation of indoor climbing seems to be focused on cramming climbing equipment into even smaller spaces. The case in point is the Rotor dynamic wall from Climblock, which replaces the vertical wall with a rotating drum."

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Ultra-efficient 4,000 mph vacuum-tube trains – why aren't they being built?

Ultra-efficient 4,000 mph vacuum-tube trains – why aren't they being built?: "In the 1800s, when pneumatic tubes shot telegrams and small items all around buildings and sometimes small cities, the future of mass transit seemed clear: we'd be firing people around through these sealed tubes at high speeds."

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