
From Space.com: “Space is an airless vacuum, so technically, you can’t smell anything. However, space is not a complete vacuum. It’s full of all manner of molecules, some of which have their own strong odors when we smell them on Earth. During the Apollo moon landings, the astronauts would often comment on a gunpowder-like smell once they had clambered back into the airlock and removed their helmets. Similarly, after spacewalking, astronauts returning to the confines of the International Space Station reported the smell of gunpowder, as well as ozone and something like burnt steak. So what’s going on? Where does the smell come from? Scientists have two good theories. One is that, while an astronaut is on a spacewalk, single atoms of oxygen can adhere to their spacesuit, and when they reenter the airlock and repressurize, molecular oxygen — O2, or two atoms of oxygen — floods into the airlock and combines with the single oxygen atoms to form ozone, or O3. This would explain the sour, metallic smell.”
Why would someone run thirty hours in a hurricane on a race with no course?

From the NYT: “Finally, the race directors shouted go, and the runners broke toward every point of the compass. We were all headed toward the same finish line. But in between here and there — some 120 miles on the most efficient and complete route — we would take countless different paths. That’s because adventure racing is a mash-up of an Ironman triathlon and a wilderness treasure hunt, with teams of three tracking down hidden checkpoints over vast distances in rough terrain. For this national championship contest, we had to seek 50 checkpoints secreted throughout the Monongahela National Forest over the course of 30 hours — during which time few teams would sleep. To reach the checkpoints, we could use only our feet, mountain bikes and canoes, and for navigation we had to rely on maps and compasses. Whichever team found the most checkpoints (and crossed the finish line) by the deadline would win.”
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