Drik Schulze-Makuch writes for Big Think: “In the mid-1970s, NASA sent two Viking landers to the surface of Mars equipped with instruments that conducted the only life detection experiments ever conducted on another planet. At the time of those landings, scientists had very little understanding of the Martian environment. Since Earth is a water planet, it seemed reasonable that adding water might coax life to show itself in the extremely dry Martian environment. In hindsight, it is possible that approach was too much of a good thing. For microbes that live within salt rocks, pouring water over them might overwhelm them. In technical terms, we would say that we were hyperhydrating them, but in simple terms, it would be more like drowning them.”
What we think of as exercise now used to literally be torture
From Dan Lewis at Now I Know: “The word ‘treadmill’ first entered the English language in 1822, according to the Online Etymology Dictionary. Most exercise equipment (think ‘bike’ or ‘weights’ or ‘jump rope’) describes either how to use the equipment or what makes the item useful for a workout. The word ‘treadmill’ has the ‘tread’ part, signaling that it’s used for walking, but it also has the ‘mill’ part, which suggests that it’s used for grinding something down. And while exercise can definitely be a grind, that saying wasn’t one back in the early 1800s. The early treadmills were a lot like sawmills or windmills or millstones, and the first treadmills weren’t found at your local gym — they were found in prisons. The people on them were inmates, and this was part of their sentence.”
Note: This is a version of my personal newsletter, which I send out via Ghost, the open-source publishing platform. You can see other issues and sign up here.
Continue reading “We may have accidentally killed whatever life there was on Mars”