A Hong Kong court has ruled that two Tiananmen vigil activists have a case to answer over calls to “end one-party rule” in China in a subversion trial under the Beijing-imposed national security law.

Every year, math nerds and dessert enthusiasts celebrate Pi Day on March 14, a date whose digits represent the first three digits of the mathematical constant pi.

Math fanatics from all around the world and everyone else who just loves ancient Greek pi (or pie) celebrate on March 14.

Learn these interesting facts about pi before Pi Day on March 14 Facts about pi you don’t want to miss How much do you really know about pi? Sure, you’ve heard about it in math class, but this famous ...