In the long and hallowed history of flight, engineers are writing a new chapter. It’s a chapter that involves skies more distant than the stratosphere of our own world. Space flight designers today ...

Photosynthesis changed Earth in powerful ways. When photosynthetic organisms appeared, it led to the Great Oxygenation Event. That allowed multicellular life to evolve and resulted in the ozone layer.

Commonly known as the Fuller report. Comprises testimony of six scientists before the House Committee on Science and Astronautics, July 29, 1968, in rebuttal to the Condon Committee report. Edited, ...