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.
Developments in mitochondrial DNA sequencing are returning South Africa's slavery heritage to view.
The first people to make it to Australia could have navigated their way by sea crossing, reaching the north-west coastline of the island continent more than 50,000 years ago.
An ancient sexual conflict over mitochondrial inheritance may be responsible for the evolution of the two sexes as we know them.