From the U. of Tokyo, in Japan. It's glass made out of something called polyether thiourea (sounds organic) rather than more common mineral glass. When it's broken, the broken surfaces re-form chemical bonds and cracks in the glass heal. Just hold the broken pieces together and the crack goes away. The healed cracks are strong too and can take almost as much stress as unbroken glass.
https://www.yahoo.com/news/self-healing-...26371.html
http://science.sciencemag.org/content/ea...m7588.full
(Subsequent edit: thiourea is organic. It's urea with a sulfur atom instead of an oxygen atom. Chemists use it in organic symtheses.)
https://en.wikipedia.org/wiki/Thiourea
https://www.yahoo.com/news/self-healing-...26371.html
http://science.sciencemag.org/content/ea...m7588.full
(Subsequent edit: thiourea is organic. It's urea with a sulfur atom instead of an oxygen atom. Chemists use it in organic symtheses.)
https://en.wikipedia.org/wiki/Thiourea