Humans and other mammals cycle through distinct sleep phases. One of them is easily recognized by the darting motion of the eyes behind closed lids, giving it its name: REM (rapid eye movement) sleep.

For generations, biology textbooks have drawn a clean line, only four limbed animals like mammals, birds and reptiles have a ...

In order to research collective movement behavior in fish, the scientists used a so-called "force map,"—in this case, a visual representation of the various individuals' speeds, symbolized by arrows ...

Researchers questioned if coordinated group movements by animals moving through a fluid could reduce the energy cost of locomotion. By combining biomechanics and bioenergetics the researchers found ...

Some reef fish have the unexpected ability to move their jaws from side to side, biologists have discovered. This ability -- which is rare among vertebrate animals -- allows these fish to feed rapidly ...

Fish movement ecology in marine protected areas (MPAs) examines how individuals and populations use, traverse and connect discrete spatial zones under conservation regimes. The discipline combines ...

Many animals, including apex predators, move in groups. We know this collective behavior is fundamental to the animal's ability to move in complex environments, but less is known about what drives the ...