› added 5 years ago

157

TIL that a Ha-Ha is a wall that is recessed into the ground in order to preserve an uninterrupted view of the landscape beyond. A Ha-Ha is used at the Washington Monument to reduce the visual impact of security measures following 9/11.

Read more wikipedia.org

via reddit.com

kOkx4 TIL that Notre-Dame cathedral features a carving of a knight fleeing from a rabbit, symbolizing cowardice. This carving inspired the Rabbit of Caerbannog scene in Month Python and the Holy Grail.
6E5Z TIL on September 7, 1978, a Bulgarian Dissident Writer named Georgi Markov was waiting at a bus stop in London when he felt what he thought was a bug bite. Three days later he died, having been shot in the leg with a sophisticated umbrella-gun loaded with a bullet containing ricin poison.
QGWL TIL the Catholic Church considers superstition to be a sin.
W7XAB TIL Japan during the 60s and into the late 80s was using a coagulant catalyst to treat hemophilia called Fibrinogen Concentrate by pooling plasma from donors. However, due to under-regulation, donors were not screened for diseases like Hepatitis, which resulted in thousands infected
4XRDR TIL Pets can be allergic to human especially cats, just like we can be allergic to them.