While it seems like researchers are finding new fossils all the time, it is actually quite rare for an animal to become fossilized. The vast majority of all animals that ever lived do not become ...

A series of whole genome and gene duplication events that go back hundreds of millions of years have laid the foundations for tissue-specific gene expression, according to a new study. The 'copy-paste ...

Sex is determined in a variety of different ways throughout the animal kingdom. In mammals, it is determined genetically, not by temperature, as it can be in reptiles. Typically, females have two X ...

In an excerpt from the new book Secrets of the Octopus, an animal lover offers insight into this “strange, beautiful, curious creature.” Heavy webbing between the arms of a female blanket octopus ...