Zombie cell
“From the living cell, this process creates hardened silica structures that look the same as the previously living cell, but can survive greater pressures and temperatures than flesh ever could, and can perform some functions better than when they were alive.”
http://energy.gov/articles/zombie-replicants-outperform-living
(fr) http://www.huffingtonpost.fr/2014/01/14/-photos-virus-mortels_n_4593269.html?utm_hp_ref=fr-science