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.
Artist’s impression of the surface of the planet Proxima b, orbiting Proxima Centauri.
Scientists have finally found an Earth-like planet we may actually be able to visit.
Scientists are working out how to grow plants in space, ready to use them as food when we visit other planets.
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.
Are we soon to visit Alpha Centauri (left)?
Building a tiny starship may be doable. The big challenge will be making sure it survives all the hazards in interstellar space.
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.
The European Space Agency is exploring what we can learn from animals about long-term deep sleep.
Walk on the wild side.
Scott Kelly's year in space is over. Now we need to know what it did to his body.
Out of this world.
We already have much of the technology we’d need to start a colony on another planet.
Tragedy: Challenger exploded shortly after launch from the Kennedy Space Centre.
We should honour the dead by striving to go further.
No warp drives or worm holes required.
© 2014 Lucasfilm Ltd. & TM
Four decades later, I find myself surveying 13 billion years of cosmic history and mapping events that really did happen a long time ago in galaxies far, far away.
Space is now big business. But is that good – or bad – news for NASA?
Hyperspace may one day be a reality.
Many people think relativity puts a hard speed limit on the universe, but it actually opens up the possibility of faster-than-light travel - if we can overcome some significant practical hurdles.
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?
Five science (fiction) reasons why you should get to know Doctor Who.
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.
Reported "evidence" that the proposed fuel-free "EmDrive" works (and breaks the known laws of physics) is nothing of the sort.