Getting sick in space on the way to Mars
On the long, deep-space journey to Mars, humans will face unique health risks - but a University of Melbourne expert says the solutions are closer than we think
Alien life as we know it
Science is showing that the discovery of life on another planet - the premise of the movie Life - is becoming more likely. Our scientist / reviewer explains why
Why science matters: Five of the best stories
A potential ebola vaccine, water on Mars, record warming, 3D body parts and the cancer risks involved in eating processed meat all made 2015 science headlines.
What happened to Mars’ atmosphere?
Nasa says the MAVEN spacecraft reveals Mars' atmosphere is blowing in the solar wind, and the stronger the wind is, the more dramatic the loss.
Running water = possibly life on Mars
Discovering liquid water on the Red Planet is a big step towards finding life forms, but don't get too excited just yet - definitive proof is still years away.