Before the 18th century, only white swans were seen on the lake surface in Europe, and people had never seen swans of other colors, so they defaulted to the fact that swans were all white. Until later discovery in Australia black...
11-21
"Black Swan" Event Concept: "Black Swan" generally refers to those unexpected small probability high-risk events, once the impact is enough to subvert any previous experience, with unpredictable ...
11-11
The young and famous Natalie Portman was the darling of directors. She has participated in the performance of movies such as "The Thread of Fire" and "Love SpecialTy". At the age of 18, he participated in "Before Star Wars...
11-07