ISS and Endeavour seen from the Soyuz TMA spacecraft.
Sperm that's been to space is good enough to get mice pregnant – and give birth to healthy offspring.
Look ma, no gravity!
Every moment of life on our planet has had the force of gravity in the background. But the prospect of long-distance space travel means it's time to figure out what happens to our biology in its absence.
Separated at launch. Scott and Mark Kelly.
A twin experiment in space can help us prevent diseases on Earth.
Workers wave flags as the rocket carrying the Shenzhou-9 spacecraft being moved to the launch pad.
We don't know where Tiangong-1 will land but the risk of someone being hit is about 1 in 3,200.
Artist’s depiction of a pair of O'Neill cylinders.
Rick Guidice NASA Ames Research Center
Future factories in space could be used to launch large structural sections to build space stations.
Right, time for a little zero gravity and chill…
What viewing on the International Space Station tells us about life among the stars.
Tim Peake, Yuri Malenchenko and Tim Kopra are about to return to Earth after a six-month stay at the ISS.
In theory, astronauts get the equivalent of a lethal x-ray dose during a six-month stay at the ISS. Here's why we don't have to worry too much though.
Ron Garan during one of his four spacewalks.
Former NASA astronaut Ron Garan speaks his mind about space travel, terraforming and religion.
A render of the BEAM attached to the International Space Station.
Inflatable space habitats, like the one installed on the International Space Station this week, could see wide application in space and planetary exploration.
This attractive specimen, collected from a doorknob in New York, loved being in space.
Alex Alexiev/UC Davis
One common terrestrial bacterium has been found to grow in the microgravity of the International Space Station than on Earth, although it remains a mystery why.
Soviet’s Mir space station in 1986.
Soviet space station Mir hosted astronauts from a significant number of countries – laying the foundation for the ISS. But how long will this collaborative spirit last?
How many astronauts does it take to undo a bolt?
Scientists on the International Space Station are preparing for one of the biggest DIY challenges of their lives.
Humans have now been living on the International Space Station for 15 years. Here's what we've learned.
Tim says bye.
What does it feel like to prepare for a journey to space? Space scientist Monica Grady followed astronaut Tim Peake around for a few days before his launch to find out.
Nope, a flag is not enough to make the moon a colony.
The US has been beaming up free-market principles to outer space for decades. But the new Space Act is a step too far.
I’m not coming in. I might catch something.
New research shows that bacteria is thriving on the ISS. But is that really such a bad thing?
Humans didn’t evolve to deal with the unique conditions of space travel.
Hollywood may already have done it but when we eventually send real astronauts to Mars, what medicines should we arm them with? And will they work the same way as they do on Earth?
Andreas Mogensen, Aidyn Aimbetov and Gennady Padalka rest outside their spacecraft and are surrounded by support personnel after landing.
Gennady Padalka has returned to Earth from the International Space Station. He has broken the record for time in space and will be the first person on Earth to have eaten salad grown in space.
Hurricane Arthur photographed by ESA astronaut Alexander Gerst.
Astronauts living on the ISS get to experience the wonders of the universe's natural phenomena like no one else.
Astronaut Cady Coleman harvests one of our plants on Space Shuttle Columbia.
Plants on the International Space Station must figure out how to grow in a completely novel environment. Their adaptability hints at how they'll react to changes here on Earth – or in future space outposts.