2 They are more relaxed
People who rise early tend to have higher levels of the stress hormone cortisol which stays high all day. On the contrary people who stay up late into the nights do not receive the same amount of cortisol in the morning.
3 The Night Owls are likely to be more intelligent
A study conducted by University of Madrid on the sleeping patterns of roughly a thousand teenagers revealed that while the early risers are more likely to get better grades, the night owls scored higher on tests of general intelligence.