reconnaissance missions

How have spaceflights changed since 1999?

Space travel has evolved tremendously over the last quarter century, moving from government-led missions of exploration to a more dynamic and commercially focused field. In 1999, there were 79 orbital launch attempts, including intercontinental ballistic missiles (ICBM) tests. Most of the tasks were performed by respected people space shuttleThe Delta and Soyuz rockets are led… Read More »

A group of World War II-era scientists used themselves as guinea pigs to learn to breathe underwater. His experiments helped make D-Day possible.

During World War II, scientists conducted experiments on themselves to help divers and submarine crews. Scientists have performed more than 600 experiments on themselves, breathing in CO2, oxygen and more gases. The British Navy used its data for reconnaissance missions, including before D-Day. On January 18, 1944, a miniature submarine known as the X-craft sailed… Read More »