It's a groundbreaking step, but hardly surprising.
We haven't seen a rock like this in 50 years.
New high-res images from New Horizons reveal a very blobby space rock.
Don't worry, no one has gotten sick yet.
Stomachs weren't built for space.
Reflections from a prodigious force in space exploration.
We all like having options.
To gain an edge here on Earth, China is pushing ahead in space
A lesson from the Apollo missions
To take us to Mars and beyond
Going to Alpha Centauri "within a generation"
Four possible scenarios...
Q&A with Amy Shira Teitel on 'Breaking the Chains of Gravity'
China's most powerful rocket engine makes a successful debut
Will there be horrible consequences? Live video right here
Wonder what space lettuce tastes like?
Where no yeast has gone before
Human hibernation could be a great way to get to Mars (and beyond), but a few big questions remain.
Will NASA be required to fund the Dream Chaser?
The Dawn spacecraft could change the shape and scope of future missions
The next generation of planetary missions will look past surface appearances
Twins Mark and Scott Kelly are key to understanding how space impacts our bodies