TIL       
 今天我听说,今天我得知(today I learned 的缩写,常用于社交媒体,用在给出有趣的新信息之前)
abbreviation for today I learned: used in writing, for example on social media, before giving interesting new information
  TIL "Hey Jude" and "Bohemian Rhapsody" were both recorded using the same piano. 今天我听说,《嘿,朱迪》和 《波西米亚狂想曲》这两首歌都是用同一架钢琴伴奏录制的。 
 - More examples
 - TIL the Night Witches was a WWII German nickname for the all-female aviators of the 588th Night Bomber Regiment.
 - TIL even though Benjamin Franklin is credited with many popular inventions, he never patented or copyrighted any of them.