Investigator Dan Heck summarizes a new study. Heck says: “Moon dust, or above ground dirt, is apparently as toxic as regular ground dirt, but not ground dirt, which is about as toxic as unground dirt.” The study is: “Estimate of safe human exposure levels for lunar dust based on comparative benchmark dose modeling,” John T. […]
Tag: earth
Just the facts, man… The persistence of misconceptions
Derek Muller writes (and explains in more detail than I’m presenting here): “It is a common view that ‘if only someone could break this down and explain it clearly enough, more people would understand.’ However it is debatable whether clear, concise explanations really work…. People have existing ideas about real world phenomena before they encounter […]
Billiard balls versus the earth
“All balls must be composed of cast phenolic resin plastic and measure 2 ¼ (+.005) inches [5.715 cm (+ .127 mm)] in diameter and weigh 5 ½ to 6 oz [156 to 170 gms]. Balls should be unpolished, and should also not be waxed. Balls should be cleaned with a towel or cloth free of […]
Heavens on and off the earth
Nicholas Heavens [pictured below] is a postdoc in the Department of Earth and Atmospheric Sciences at Cornell University. Heavens has turned his wond’ring gaze to what happens on our own planet and to the goings-on elsewhere. You might enjoy reading his take on Martian dust distribution: Heavens, N.G., Richardson, M.I., Kleinbhöl, A., Kass, D.M., McCleese, […]