When NASA’s twin Voyager probes left Earth in 1977, they carried computers weaker than a hand calculator and a modest goal of ...

Humanity has already flung machines into interstellar space, but sending people is a different problem entirely. The physics ...

Another day, another ambitious company emerges to harness the power of the Sun from Earth's orbit. Okay, it's not quite that common an occurrence, but there are indeed a number of firms giving this a ...