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New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.

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From fish harvests to cottonwood forests, organisms display evidence that species change can occur on timescales that can influence ecological processes.

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image: The Genetics of Society

The Genetics of Society

By | January 1, 2015

Researchers aim to unravel the molecular mechanisms by which a single genotype gives rise to diverse castes in eusocial organisms.

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image: On the Other Hand

On the Other Hand

By | September 1, 2014

Handedness, a conspicuous but enigmatic human trait, may be shared by other animals. What does it mean for evolution and brain function?

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image: The Sex Paradox

The Sex Paradox

By | July 1, 2014

Birds do it. Bees do it. We do it. But not without a physical, biochemical, and genetic price. How did the costly practice of sex become so commonplace?

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image: Crowd Control

Crowd Control

By | July 1, 2013

Molecules, cells, or vertebrates—when individuals move and act as a single unit, surprisingly complex behaviors arise that hint at the origins of multicellularity.

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image: Color from Structure

Color from Structure

By | February 1, 2013

Researchers are working to understand how often-colorless biological nanostructures give rise to some of the most spectacular technicolor displays in nature.

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image: Fat's Immune Sentinels

Fat's Immune Sentinels

By | December 1, 2012

Certain immune cells keep adipose tissue in check by helping to define normal and abnormal physiological states.

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image: Coming to Terms

Coming to Terms

By | November 1, 2012

New noninvasive methods of selecting the most viable embryo could revolutionize in vitro fertilization.

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image: Lamarck and the Missing Lnc

Lamarck and the Missing Lnc

By | October 1, 2012

Epigenetic changes accrued over an organism’s lifetime may leave a permanent heritable mark on the genome, through the help of long noncoding RNAs.

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