Exhibition 'Bacteriopolis'

Thousands of different species live in this colorful bacterial terrarium - green cyanobacteria, orange iron oxidizers and gray cellulose eaters. What you see today will disappear tomorrow in this living work of art in a state of constant change.​

To create this colorful culture, scientists mixed a bucket of mud from a pond in Golden Gate Park along with eggs and toilet paper. A low-maintenance exhibit that can live and thrive indefinitely - all it needs is sunlight and the occasional addition of water.