|High concentrations of heavy metals are toxic for most living creatures.
However, that is not the case for the bacterium C metallidurans, which has found a way to extract valuable trace elements from a compound of heavy metals without poisoning itself.
The bacteria produces tiny gold nuggets as a side-effect.|
As early as 2009 researchers were able to prove that C metallidurans is able to deposit gold biologically.
|In nature, C metallidurans plays a key role in the formation of so-called secondary gold, which emerges following the breakdown of primary, geologically created, ancient gold ores.|
It transforms the toxic gold particles formed by the weathering process into harmless gold particles, thereby producing tiny gold nuggets.