4,861,706: number of words in NASA's Astronautics & Aeronautics Chronology, started in 1959. Popular Science and the Office for Creative Research went through 11,000 pages of NASA history to find 4,000 discrete phrases that illustrate the agency's evolving linguistics over the last 55 years.
53.5: weight, in tons, of China's upcoming TA-600 seaplane prototype. When construction is completed in 2015, it'll be the largest seaplane in the world, beating out the current record-holder, Japanese ShinMaywa US-2, which weighs in at 47.3 tons.
180: weight, in tons, of the Hughes H-4 "Spruce Goose", the world's largest seaplane ever built. The aircraft made only one brief flight on November 2, 1947.
80 percent: the accuracy of researchers using a blood test to predict which participants in a study were experiencing suicidal thoughts or had attempted suicide. Predictions were based on analysis of the gene SKA2, which is thought to play an important role in the way our brains handle stress.