microbes

Methane could be produced by microbes on Mars, too, if they exist in enough numbers.

The Soviet Union, too, tried its hand at the project by attempting to "grow the microbes."

A moment of silence for all those microbes who died in the oxygenation of Earth's atmosphere.

Clouds are full of microbes; they have been found in deep mines and on the ocean floor.

With each bite, tens of trillions of gut microbes nosh with you.

As concerns the man who has gone unpunished eleven million years, is it your belief that in life he did his duty by his microbes?

Why does he affront me with the fancy that I interest Myself in trivialities—like men and microbes?

He's just a basketful of festering, pestilent corruption, provided for the support and entertainment of microbes.

Slowly, interminably, the time dragged by while the microbes that had been introduced into his body were at their work.

They were engaged in developing vast quantities of microbes to be spread over Earth.