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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