mars

New research shows that the speed of sound on Mars varies considerably by location and temperature. The findings could help scientists understand sounds picked up by Martian rovers, as well as make future crewed ventures safer.

This pit crater making recent headlines may open into a larger cave that could provide a sheltered environment for both astronauts and hypothetical Martian life.

A stunning photo of the recent "parade of planets" shows Mercury, Mars, Jupiter, Saturn, Uranus and Neptune in alignment over Earth. It was captured from the U.K. on June 1.

Potentially hazardous asteroids pose a risk to Mars missions, but they can also yield insight into the history of the Red Planet and the early solar system, new research suggests.

Six worlds will align for a "parade of planets" on June 3, although only a few of them will be visible to the naked eye. Here's what you need to know about the rare alignment.

Previously unpublished photos of Mars' moon Phobos hint that the mysterious satellite may actually be a trapped comet — or perhaps just a piece of one, along with its twin moon Deimos.

Newfound rocks on Mars suggest the planet may have once sported an oxygen-rich atmosphere, making it more Earth-like and hospitable to life than previously thought.

Mars has had frequent planet-wide auroras in recent months, including an unprecedented trio of events in February. Experts say the sudden increase is the result of the ongoing solar maximum.

Every spring, creepy black 'spiders' sprout up on Mars as buried carbon dioxide ice releases dusty geysers of gas. New ESA images show the phenomenon has begun in the strange Inca City formation.

Researchers have found microbes thriving 13 feet beneath the scorched surface of Chile's Atacama Desert, marking the deepest discovery of microbial life in the region to date.