A live classroom aboard China’s Tiangong space station offered an unforgettable sight: a candle flame turning into a floating ...

A planetary scientist who has participated in analog missions describes their value for planning space exploration – and ...

Mars’ north polar vortex locks its atmosphere in extreme cold and darkness, freezing out water vapor and triggering a dramatic rise in ozone. Scientists found that the lack of sunlight and moisture ...

Blocks of frozen carbon dioxide sliding down Martian dunes may have carved the planet’s strange gullies, mimicking the work of living creatures.

Massive volcanic eruptions billions of years ago may have made it snow on Mars, leaving thick buried ice near the planet’s ...

"We have found a habitable environment," said John Grotzinger, project scientist for the Curiosity mission. "The water that was here was so benign and supportive of life that if a ...

"The CO2 ice block began to dig into the slope and move downwards just like a burrowing mole or the sandworms from 'Dune.' It ...

Mars is closer than ever, but the human body isn’t ready. Inside the biological war against radiation, microgravity, and ...

With the advent of commercial spaceflight, an increasing number of people may be heading into space in the coming years. Some ...

New research reveals Mars’ mysterious gullies were carved by burrowing CO₂ ice blocks, not water, reshaping its story.

The equatorial regions of Mars are home to unexpectedly enormous layers of ice, and they may have been put there by dramatic ...

A new scientific theory on solar tide effects has dramatically improved the accuracy of calculating how much faster clocks ...