evolution
Dip in oxygen levels delayed evolution by 2 million years
The 'Great Oxidation Event' introduced oxygen into the atmosphere around 2.4 billion years ago.
DNA affects mate selection for intelligence
Among the highest ranking qualities people look for in a potential partner are intelligence and educational attainment.
Mammals use their teeth to seduce mate: study
This reshapes our understanding of our deep evolutionary root, particularly that of the canine which likely originated as a display organ.