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Researchers from Aachen University in Germany believe just 10 per cent of people can be catagorised as 'morning people'
The scientists built on previous research that indicates people who naturally tend to stay up late sleep less well and are more tired during the day
Researchers found a reduction in the integrity of the night owls' white matter in areas of the human brain associated with depression
Some people claim to be unable to function properly early in the morning, while others are most productive at the crack of dawn and now German researchers believe they understand why.
Scientists have discovered for the first time that there are structural brain differences between early risers and people who naturally find themselves staying up late.
They believe these differences could help unlock why some night owls are more prone to depression and can suffer from a form of chronic jet lag.
German scientists have discovered for the first time that there are structural brain differences between early risers (pictured) and people known as night owls who naturally stay up late
Researchers from Aachen University in Germany believe approximately 10 per cent of people can be catagorised as 'morning people,' while around 20 per cent are true night owls and find themselves staying up late without any effort.
They think all remaining humans have relatively normal body clocks, which are determined by chronotypes, New Scientist reported.