Researchers identify specific areas of DNA sequence that are related with the age at which we have our first child, and the total number of children we have during the course of our life.
In a first, scientists found ancient gene mixing between chimps and bonobos, humankind's closest relatives, showing parallels with Neanderthal mixing in human ancestry.
Deoxyribonucleic acid (DNA) is the molecule that stores the biological information and genetic instructions that makes each species unique. Check out some mind-bending facts about the code inside all living organisms.