While existing theories of political polarization tend to suggest that the opinions of liberals and conservatives move in opposite directions, available data indicate that opinions on a wide range of ...

All plants and animals are host to a community of microorganisms, their microbiotas, which have crucial influences on the life history and performance of their hosts. Despite the importance of such ...

For more than half a century, many biologists have leaned on the neutral theory of molecular evolution to explain how DNA and proteins change over time. The idea grew from early work in the 1960s, ...

Based on a critical survey of existing theory, this international group of scientists are proposing several novel theoretical approaches and conceptual frameworks to stimulate and guide new research ...

The discovery of Lucy, a 3.2 million-year-old skeleton, changed our theory of human evolution forever. The discovery is celebrating its 50-year anniversary, and continues to capture human imagination.

For a long time, evolutionary biologists have thought that the genetic mutations that drive the evolution of genes and proteins are largely neutral: they're neither good nor bad, but just ordinary ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The story of how us humans—and other mammals—got our noses may have ...

We share the planet with a huge diversity of plants and creatures. But we can see similarities between organisms that live continents apart or are very different in other aspects. One reason for this ...