Materials science
Stronger when stricken
Mar 31st 2011 | from the print edition
ONE of the valuable properties of bone is that when it endures repeated stress it responds by becoming denser and stronger. A living material can do that. A non-living one cannot. It has no way of adding the extra matter needed to provide the extra density. But it would help engineers a lot if non-living stuff could at least stiffen in response to stress—and that may now be possible. Brent Carey, a graduate student at Rice University in Texas, thinks he has found a way to make it happen.
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