Cultural and technological innovations appear to be the main drivers of adaptation. But have they replaced biological ...

Aa Aa Aa Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population ...

As Gautschi et al. explain, genetic drift, arguably the most powerful evolutionary force at work in small populations, results from the random sampling of alleles from one generation to the next ...

A spotless cheetah, a sight unseen for almost a century, has been photographed in Kenya's Athi Kapiti Conservancy. This rare ...