Cooperation in Biology

Paramecium digesting smaller microbes

Paramecium with symbiotic Chlorella (algae)


Hydrothermal Vent

Tube Worms:
Tidal pool: Worms eat and are eaten
Hydrothermal vent: Worms cooperate with symbiotic bacteria
(red "blood" contains H2S)

The Microbial World (Ken Todar, UW-Madison)


Cleaning Birds and Fishes

Rhinoceros with tick-eating bird

Buffalo with tick-eating bird

Wrasses "cleaning station"


Cooperation among Bonobos

Bonobos #1

Bonobos #2


Strong Acid Dehydrates Sugar

Sulfuric acid plus sugar #1

Sulfuric acid plus sugar #2