The Mars weather is beautiful today, and an astronaut is about to suffocate to death under the cloudless blue sky.
The trouble starts after three crew members leave the safety of the Hab, their pressurized six-person living station, and venture outside to do some routine work. They trudge along in 35lb spacesuits, breathing air pumped by fan and watching the jagged red landscape through their fishbowl-like glass helmets.
