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TIL. There is the - hyphen, the longer – en dash (Alt+0150), and the longest — em dash (Alt+0151).

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GdgG TIL that Amazon named a building after its first customer who spent $27
OolpY TIL in September 1939, at the onset of World War II. The Night Watch was detached from its frame and rolled around a cylinder. The rolled painting was stored for four years in a special safe that was built to protect many works of art in the caves of Maastricht, Netherlands.
pJy4 TIL Claude Monet had Aphakia (the absence of an eye lens) in his later years, after two operations to remove his cataracts. The procedure enabled him to see ultraviolet light (400–300 nm). [Link in comments]
8eMQK TIL only a slim majority of Americans realize Puerto Ricans are American citizens.
ne9RB TIL the earliest known sources of uranium were in Naples, Italy & Jáchymov, Czech Republic. Uranium is 40 times more abundant in the Earth's crust than silver. 1 KG of uranium-235 can produce as much energy as 1.5 million KG of coal.