unbfacts: Doing lots of exercise in older age can prevent the immune system from declining and protect people against infections. Scientists followed 125 long-distance cyclists, some now in their 80s, and found they had the immune systems of 20-year-olds. Source

unbfacts: The first American woman to go to medical school was admitted as a joke. The students at Geneva Medical College thought it was joke when Elizabeth Blackwell applied to attend 1847. She graduated in 1849, started her own practice, and opened an infirmary for the poor. Source

unbfacts: A cave in France has the footprints of an eight to ten-year-old boy left in the mud 26,000 years ago alongside the paw prints of either a wolf or a large dog, the oldest evidence of human/canine relationships ever found. Source

unbfacts: In the 1980s, A&W tried to compete with McDonald’s Quarter Pounder by selling a 1/3 pound burger at the same price. The product failed, because most customers thought a ¼ pound was bigger. Source