Fish schools showed an U-shaped metabolism-speed curve and reduced the energy use per tail beat up to 56% at high swimming speeds compared to solitary fish.

Muscle power-generating capabilities, and not energetic limitations, limit the breaching abilities of the largest whales.

Calculations of flagellar energetics from beating patterns in sperm reveal that internal dissipation by dynein motors and other passive structures within the flagellum significantly exceeds external hydrodynamic dissipation.

Fish swimming in groups can either conserve or expend energy during collective movement, depending on their spatial position within the school.

Prokaryotic and eukaryotic flagella follow a common trend in swimming cost-effectiveness, but eukaryotic flagella are too large for cells with prokaryote volumes, yielding insight into flagellar dissimilarity between taxa.

Fish in the thrust wake of a flapping foil reduce tail-beat frequencies, synchronize with oncoming vortices, and swim energetically more efficiently.

A plastic behavior in Escherichia coli is enabled by a single amino acid replacement in adaption to changing environments.

All the characteristic traits of the eukaryotic cell, the basic unit of all macroscopic life, commenced to originate in a prokaryote as means to serve an endosymbiont today known as mitochondria.

A whale leaping above the surface expends an enormous amount of energy, displaying its health and strength to peers and potential mates.

Habitats of satellite-tracked blue sharks were shifted surfaceward by an oxygen minimum zone (OMZ) at depth thereby increasing their susceptibility to capture by longline fishing focused above the OMZ.