A new kind of CAPTCHA?

CAPTCHAs, the automated tests that are meant to prevent spam-bots from overrunning free e-mail services and comment forms, have been defeated. What’s next? Hopefully not something like this… I tried it three times, and only succeeded twice. Statistics also indicate that it wouldn’t work too well — there are less than 30 variations, so even …

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Pee Used To Create Self-Healing Substance

I can’t say it any better than the BBC: The as-yet-unnamed material – a form of artificial rubber – is made from vegetable oil and a component of urine. The substance, described in the journal Nature, produces surfaces when cut that retain a strong chemical attraction to each other. Pieces of the material join together …

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The Ever-More-Ubiquitous Webcam

In the David Brin SF novel Kiln People, the main character (a detective) follows someone’s movements at one point by tracking them via the public and private webcams that cover nearly every square inch of the city. When the book was first released in 2002, the reader could have been forgiven for thinking that was …

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