The study, using the water flea Daphnia as a model organism, reveals that multicellular organisms require significantly more energy than single-celled ones. In fact, studies show that these ...

The "boring billion" shaped multicellularity, with energy demands sparking complexity. This era shows evolution's cost.

A type of zooplankton, Daphnia pulex (a.k.a. the water flea) is a microscopic crustacean whose unique reproduction habits ...