Fellow night owls, some reading for you all. We are indeed unique and very prone to be ADHD and Autists.
https://en.wikipedia.org/wiki/Delayed_sleep_phase_disorder
DSPD is genetically linked to attention deficit hyperactivity disorder by findings of polymorphism in genes in common between those apparently involved in ADHD and those involved in the circadian rhythm[47][48] and a high proportion of DSPD among those with ADHD.[49]
Persons with obsessive-compulsive disorder are also diagnosed with DSPD at a much higher rate than the general public.[50]
Remember when Q bumped the "reincarnated extraterrestrials" post? Think about rays of light and their greatest % of transmittance with respect to angle and take into account the Earth tilt during the various seasons. Anyone else not a big fan of getting up early during the Summer days? Now imagine a slightly different planet with less atmospheric shielding and less Magnetic shielding (van allen belts) against solar EM radiation. Would you risk your eyes to venture out early?
I'm still doing more digging regarding the "ADHD" moniker. So far I've stumbled on bad O2/CO2 concentrations (particularly noticeable inside of classrooms and workspaces) and inadequate mineral intakes.
God Bless America.