Karen Nyberg and Mike Hopkins are our only hope.
The only thing live on Mars right now is Curiosity's camera. Maybe.
Every one of these visual stunners is licensed under Creative Commons.
NASA astronauts on the International Space Station—and some on the ground—took questions in front of an online audience of more than 7,000 people.
NASA hasn't released a formal statement about its recent findings, leading to intense online speculation.
James Attlee looks at what we are losing in the essential human experience of the nighttime and tries to reclaim it.