Photo by Emma Pryll Various mosses including pincushion (Platygyrium repens) at Panama Rocks. Observing natural movements, the growth of the Earth, and the ecosystems sustaining it has become a ...

Even Charles Darwin was puzzled by the evolution of the vertebrate eye. New research suggests that it traces back to a cyclopean invertebrate with a single eye atop the head. By Carl Zimmer Look at ...

In the oceans and on land, scientists are discovering rare, transitional organisms that bridge the gap between Earth’s simplest cells and today’s complex ones. By Carl Zimmer A flurry of new studies ...

Finger length may reveal more than you think about human evolution. Boys with higher prenatal estrogen exposure showed larger head sizes at birth, pointing to a possible hormonal boost behind the ...

Survival of the fittest. Nature red in tooth and claw. The common view of natural selection is based solely on the individual: A trait allows an organism to out-compete its rivals and is thus passed ...