To expand their color palette beyond white, yellow, and orange, the researchers got creative with their methods. Boeke’s team coupled yeast Golden Gate cloning and the versatile genetic assembly ...

Doctors Say They're a "Petri Dish" of Bacteria. Story by Lauren Gray ... Fungal organisms like yeast and mold can also ruin your bed sheets, especially if they’re damp from sweat.

So unknown to Maier, he was a walking Petri dish for the Pacman yeast used at Rogue. And he might have picked up the wild yeast from eating something fruity, creating this unique blend for beer.

They also seem to fade under certain conditions: when petri dishes are kept in the dark, according to one lab, or when yeast are fed a nutrient-rich diet, according to Protacio’s own work.

A petri dish holding the yeast candida auris is shown in a laboratory of Wuerzburg University, Jan. 23, 2018, in Wuerzburg, Germany. Nicolas Armer/Picture Alliance via Getty Images.

They also seem to fade under certain conditions: when petri dishes are kept in the dark, according to one lab, or when yeast are fed a nutrient-rich diet, according to Protacio’s own work.