pmc.ncbi.nlm.nih.gov

m1GLy TIL that before the invention of electric light, most Europeans had two phases of sleep, awakening late at night before sleeping again, called biphasic sleep
dD579 TIL the homochirality of biological molecules is exclusively a feature of life on Earth. Extraterrestrial samples contain largely racemic compounds, and common organic syntheses always yield racemic mixtures. It is not known to science why that is the case.
oRAyL TIL that in Korea, there have been multiple claims of tooth loss due to stress. A Korean study even confirmed a link between the two.