living in the city, especially in apartments and in high buildings is prevailing lifestyle of today.
Some may disagree in the way of life. As some people prefer morning while others prefer nightlife.
In the world of sleep studies, there are "night owls" (people who are in bed after 11 p.m. and awake after 8 a.m.) and "larks" (the mythological creatures who get up before 8, even on the weekends). There are lots of studies about how the two different sleep schedules make for different brain types, but not a lot about what made them different in the first place. But according to a study published in Nature in 2016, a difference in circadian rhythms might be written into your genes.
The study was a genome-wide association study (also known as a GWAS) using the DNA of nearly 90,000 people who had submitted their genetic material to 23andMe. The researchers discovered 15 genetic patterns that tended to be associated with being a lark. Some of those patterns lay close to patterns we know to determine circadian rhythms, and others lay near genes responsible for the eyes detecting light. The evidence is pretty clear: if you tend to wake up early, it's probably because your genes are telling you so.
Research shows that early birds are more active thus, their productivity increases but on the other hand night owls are smarter but depressed, and more happier but not necessarily healthier. More