In the future, our flying robot overlords won't just navigate terrain autonomously, they'll also report back to base with detailed 3D maps of everything they've seen -- or at least that's what this homebuilt UAV does in a video released this week. In a nutshell, MIT's combined its room-mapping Roomba with the Kinect quadrocopter radar developed at UC Berkeley, resulting in a flying contraption sure to be the envy of topographers everywhere. We're not sure that the world's robot incumbents will be too happy, though -- perhaps MIT should invest in some laser protection next.
As you may know, crafting a katana is a delicate process that involves carefully constructing a razor-sharp high-carbon edge around a soft shock-absorbent core. One day though, smiths and forging fires could be replaced by electrode-wielding mad-scientists, with the technology to selectively harden and soften metal at will. At least that's what we envisioned when we read about Jörg Weißmüller's breakthrough research in the field of nanomaterials. The German scientist discovered that by placing precious metals in acid he could create tiny ducts through corrosion. Once those channels are flooded with a conductive liquid, electrical currents can be used to harden the material and, if you change your mind about the brittle results, the effect can easily be reversed to make it soft again. The tech could eventually lead to self-healing vehicle armor or scratch-resistant cellphones -- but, really, we just want to zap our way to a high-quality samurai sword. Physorg
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