Genetic studies show mingling between populations has been the norm throughout human history.
Male lions are responsible for the movement of genes between prides. New research confirmed that the genes are traveling long distances – even though no one has been spotting the lions on the journey.
The new Tasmanian tiger genome reveals some fascinating facts about this extinct marsupial, including why they were so similar to dogs, and how they were growing more vulnerable to genetic disease.
Comparing genomes of more than 200,000 people, researchers identified genetic variants that are less common in older people, suggesting natural selection continues to weed out disadvantageous traits.
Antarctica's blue whales all feed in the same place. But a new genetic analysis suggests they are actually three separate populations that breed in different parts of the globe.