organisms

New study shows that transitions to aerobically-expensive behaviors in organisms living free in nature can have important consequences affecting the pace of aging.

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"Survival of the fittest" is the catch phrase of evolution by natural selection. While natural selection favors the most fit organisms around, evolutionary biologists have long wondered whether this leads to the best possible organisms in the long run.

A team of researchers has developed a new theory, which suggests that life may not always be optimal.

New observations from NASA's Mars Reconnaissance Orbiter indicate that the crust and upper mantle of Mars are stiffer and colder than previously thought.

The findings suggest any liquid water that might exist below the planet's surface and any possible organisms living in that water, would be located deeper than scientists had suspected.

Higher organisms do not have a "cost of complexity" -- or slowdown in the evolution of complex traits -- according to a report by researchers at Yale and Washington University in Nature.

Researchers studying bacteria capable of generating electricity have discovered that riboflavin (commonly known as vitamin B-2) is responsible for much of the energy produced by these organisms.

Researchers at the University of Minnesota studying bacteria capable of generating electricity have discovered that riboflavin (commonly known as vitamin B-2) is responsible for much of the energy produced by these organisms.