From Business-Standard:

In a breakthrough, Cambridge scientists have discovered a bizarre new property in the nuclei of embryonic stem cells that could pave the way for gen-next bulletproof vests.

Stem cells - the body’s master cells - demonstrate the property never before seen at a cellular level, scientists said.

The property - known as auxeticity - is one which may have application as wide-ranging as soundproofing, super-absorbent sponges and bulletproof vests, they said.

Not much more at the link, which is a little short on details.