Heliconian butterflies choose mates with similar wing patterns. Their genes make them do it.

Scientists have produced pigs that can resist a billion dollar animal virus.

eDNA is DNA that an animal sloughs off into its environment through feces, shedding, or lost skin. The technology can detect invasive species.

The extreme right wing has brought the discredited idea of eugenics back into the national conversation. Brave New World and Gattaca offer perspective.

Human chimeras are surprisingly common and a wonder of the human reproductive process.

Researchers in England have identified several genes associated with the timing of peak activity.