The fully processed images Cassini's flyby took of the icy moon on Wednesday won't be available until 2016. But NASA has released a suite of raw images.
The September image of Pluto's crescent beamed to Earth pales in comparison to the brilliant photo that showed up this week.
Understanding microbes could be key to better crop production as the available arable land shrinks. But scientists say they need to find better ways to collaborate across borders.
Evidence of oxygen on a comet is exciting because it is crucial in scientists’ search for life on other planets, although the presence of oxygen doesn’t necessarily guarantee life.