In theory, water-based propulsion systems are a low-cost, safer alternative to conventional engines. Water is easier to ...

With help from other ESA member states, Italy is one of the countries that already has a rocket made largely of domestic or European components. The United States, Russia, China, France, Japan, the ...

The coming decades of space exploration hinge on a single, stubborn number: the 225 million kilometres between Earth and Mars. Chemical rockets, the workhorses of every space programme to date, take ...

Now we have the opposite problem: Obama says UFOs are real and the world shrugs.