Flying a helicopter on another planet might sound like pure science fiction, yet space history has already proved otherwise. When NASA’s Perseverance rover thundered to Mars aboard an Atlas V rocket ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. We live in an extraordinary period of exploration. Over the last few decades, humanity ...

Solar eclipses are a rare and brief opportunity for scientists to gather data on everything from the physics of the sun to air pressure in the upper atmosphere The evidence is mounting: this ...