Sources · Space agency
NASA
74 facts cite this source
Technology Transportation
A jet engine works by squeezing air, setting it on fire, and shoving it backward
Earth & Climate Ecosystems
Coral reefs cover under 1% of the seafloor but shelter a quarter of marine life
Space Space Exploration
Explorer 1 becomes the first U.S. satellite and discovers the Van Allen belts
Space Space Exploration
Monkeys Able and Baker become the first to survive a spaceflight and return alive
Language & Communication Media & Communication









































































