What's 75 years old, made of wood, and largely the result of some secret military radar research? The Marconiphone 702 television pictured above, which is believed to be the oldest working television in Britain, and possibly the world. It was tracked down by a collector a few years ago, and is now set to go up for auction on April 19th at Bonhams in London, where it has an estimated sale price of £5,000 but is expected to sell for "much more." That will buy you a 12-inch screen that actually has its image reflected on a mirror in the lid, along with most of the original parts -- only about 30 percent have been replaced to get the set functional again. It can even receive digital channels with the aid of a Freeview box. Head on past the break for a glimpse of it in action.
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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