Helicopters draw a lot of attention with their almost magical ability to hover, fly in any direction and operate without runways. They also help save many lives, often dramatically, with their extensive use in all-weather military missions, ambulance duties and search-and-rescue roles.
When things go wrong, dramatic images and news stories about...
Black holes are remarkable astronomical objects with gravity so strong[1] that nothing, not even light, can escape them. The most gigantic ones, known as “supermassive” black holes, can weigh millions to billions times the mass of the Sun.
These giants usually live in the centers of galaxies[2]. Our own galaxy, the Milky Way, contains a...
Of the more than 74,000 known meteorites[1] – rocks that fall to Earth from asteroids or planets colliding together – only 385 or so stones came from the planet Mars.
It’s not that hard for scientists to work out that these meteorites come from Mars. Various landers and rovers have been exploring Mars’ surface for decades. Some of...