"The fact that terrestrial microbes are the Earth's best colonizers means we can never completely discount terrestrial ...

NASA's OSIRIS-REx mission is scheduled to return samples of Asteroid Bennu to Earth. Credit: NASA Goddard Space Flight Center ...

The origins of Mars's moons have long puzzled scientists. Two main hypotheses have been proposed: that Phobos and Deimos are ...

The analysis of hundreds of fossilized droppings (plus a little bit of petrified vomit) from roughly 230 million years ago ...