Eco-friendly alternatives to fossil fuels are venturing beyond Earth—and into space.

Download the Water bottle Rockets PDF(378 Kb ... And most bottles aren't a great shape for smooth flight. There are many other, more advanced, rocket designs. Some people compete in national ...

Water rockets are plenty of fun, but they can be even more fun if you go wild with the engineering. [The Q] is one such experimenter, who built a dual-thrust water rocket that even has a parachute ...