For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are ...

At first glance, sloths look like an evolutionary mistake. They move slowly, eat almost nothing, and seem defenseless in one of the most dangerous ecosystems on Earth. But every part of their biology ...

Some animals possess traits so extreme that they are often mistaken for myths or exaggerations. Scientists have documented these species in detail, yet their behavior and biology continue to provoke ...

Forty-five genes that encode kinesin superfamily proteins (also known as KIFs) have been discovered in the mouse and human genomes. KIFs are molecular motors that directionally transport various ...

While most research groups rely on organs from cloned, gene-edited pigs created through somatic cell nuclear transfer for pig-to-human transplantation, scientists at the Center for Innovative Medical ...