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TIL there was a “We Are the World 2” for Haiti earthquake relief

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1admV TIL that in the early 1970s, the US and China engaged in "ping-pong diplomacy," in which players from each country would compete with each other at table tennis. This form of diplomacy was a key way of defusing Sino-American tensions, and led to Richard Nixon's visit to Beijing in 1972.
x60xw TIL that "tit for tat" is not just a saying, but also a highly effective strategy in conflict resolution, which involves being nice, forgiving, provocable, and clear. It won two "prisoner's dilemma" tournaments by simply cooperating first, then subsequently mirroring their opponent's previous move.
grEKW TIL the final fight scene in Rocky Balboa (2006) was shot during an actual pay-per-view boxing match in Las Vegas. Sylvester Stallone traded real punches against former world champion, Antonio Tarver.
X01gj TIL: Caffeine is a banned substance by the NCAA. A urinary caffeine concentration exceeding 15 micrograms per milliliter (corresponding to ingesting about 500 milligrams, roughly 6 to 8 cups of brewed coffee, two to three hours before competition) results in a positive drug test.
loevN TIL 5,600 Americans died during the building of the Panama Canal, and 22,000 French workers died before the Americans took the job over.