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TIL In the U.S, a 2007–2008 survey showed that dog-owning households outnumbered those owning cats, but that the total number of pet cats was higher than that of dogs. The same was true for 2009–2010.

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69GwZ TIL a cashew nut grows as a fruit and the “nut” is actually a seed. The seed’s skin requires processing because it contains urushiol, a resin that causes skin irritation similar to poison ivy.
Yp5V7 TIL about Sanada Masayuki, the head of Sanada clan in the 16th century, sent his older son to join the Tokugawa army and his younger son to the opposing army at the Battle of Sekigahara, the turning point in feudal Japan, to ensure the survival of the clan, regardless of the outcome.
N8kP TIL in the 13th century, in order to discover which language humans would speak naturally, Frederick II, emperor of Germany, placed 50 newborns in the care of nurses who would only feed and bathe the babies but not speak or hold them. The emperor never got an answer because all of the infants died.
oBoQR TIL about Leo, an early socio-interactive robot built in 2002. Leo was programmed with psychological theory and spatial scaffolding. It is able to communicate by perceiving expression, gesture, speech, and thus responds appropriately with equal expression, gesture and speech.
d8dGE TIL The seafloor sonar data obtained during the underwater search for Flight 370 gave scientists an unusually-large section of deep-ocean seafloor mapped at high resolution; Data revealed numerous subsea volcanoes and evidence of large submarine landslides