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TIL Queen Elizabeth is also the Duke of Normandy, but only when she visits the Channel Islands. The title stays as “Duke” even if the monarch is a woman.

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via reddit.com

N71VQ TIL in February 1978, amateur adventurer Dave Voelker walked across a frozen Lake Erie on foot, departing the coast near Sandusky, Ohio and arriving the next evening in Colchester, Ontario, a distance of 28 miles.
9JyQ TIL there’s a experimental project in Stockholm, Sweden where you can sign up to recieve a SMS if there is a cardiac arrest nearby (500 m), so you can get there before the ambulance and perform CPR. 9500 people have signed up, and they reach the location faster in 54% of the cases.
nW4Y7 TIL that the teeth of a Lobster are located in their stomach. Their food is chewed in their stomach “between three grinding surfaces that look like molar surfaces.”
QJZnd TIL that Mad Magazine writer Dick DeBartolo was on the staff of game show Match Game. When it was cancelled DeBartolo started writing silly and suggestive questions - which led to improved ratings and a reversal of the decision to cancel the show
NXdAJ TIL of the discovery of chemotherapy. During WWII it was discovered that mustard gas reduced white blood cell counts. In the 1940s, two pharmacologists examined the effects of mustard gas in treating lymphoma in mice. They then treated a patient with nonHodgkin's lymphoma with the chemical agent.