Just sending a rocket into orbit is expensive. Getting to Mars would cost even more. That's why NASA is looking into cheaper options like atomic rockets.
Europa, a frozen moon around Jupiter, is believed to be one of the most habitable worlds in the solar system. It was first imaged in detail by the Voyager 1 probe in 1979, revealing a surface almost devoid of large craters. This suggested that water regularly floods up from inside, resurfacing the satellite. Europa is also criss-crossed with long troughs, folds and ridges, potentially made of icebergs floating around in melt-water or slush.
In Australia, an average baby boy born in 2016 could expect to live to 80, while a baby girl born at the same time could expect to live until closer to 85. A similar gap in life expectancy between men and women is seen around the world.
As driverless cars become more capable and more common, they will change people’s travel habits not only around their own communities but across much larger distances. Our research has revealed just how much people’s travel preferences could shift, and found a new potential challenge to the airline industry.
Beyond the cloud - With molecular data storage, cat videos could outlast us all
April 26, 1803 was an unusual day in the small town of L’Aigle in Normandy, France – it rained rocks.