He likened it to the way seashells are formed: In this case, loose sand is colonisedwithbacteria that produce urease.
2
Nearly one in four children tested in a US medical centre was colonisedwithbacteria which could resist the most powerful antibiotics.
3
At the time, he explained that the bricks were created through microbial carbonate precipitation: Loose sand is colonisedwithbacteria that produce urease.