› added 4 months ago

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TIL that the reason we feel groggy when we first wake up is caused by 'sleep inertia.' The gradual feeling of waking up is due to blood flow. Our 'primitive brain centers' get blood flow first and it isn't for 15 minutes or longer before blood flow returns to deeper thinking areas.

Read more pubmed.ncbi.nlm.nih.gov

via reddit.com

rK6y TIL Farming in South Africa if you are white is the most dangerous profession in the world with a murder rate of 99 per 100,000! This is over three times the South African national rate of 31.9/100,000, and nearly six times the rates of Zimbabwe, Sierra Leone, Rwanda, and Chad.
GAGOJ TIL that the white specks in a Thomas English Muffin are farina.
PWyZ TIL the first historical document containing the @ symbol was a wheat shipment from Castile to Aragon in the year 1448.
OoNr7 TIL that statistically conservatives tend to be happier than liberals, and this phenomenon spans across multiple countries and that this persist even after basic demographic factors have been controlled.
WkNl8 TIL that every year on September 11, firefighters in the United States will climb 110 flights of stairs in full gear in buildings or at the gym to remember the 343 firefighters who lost their lives that day.