The label on my shampoo bottle listed many compounds, and, due to my interest in chemistry, most of them were familiar or had obvious functions. However, one compound stood out as puzzling: sodium chloride.
Ordinary folks can construct 13 awesome ballistic devices in their garage or basement workshops using inexpensive household or hardware store materials and this step-by-step guide. Clear instructions, diagrams, and photographs show how to build projects ranging from the simple-a match-powered rocket-to the more complex-a scale-model, table-top...
Darwin and Evolution for Kids traces the transformation of a privileged and somewhat scatterbrained youth into the great thinker who proposed the revolutionary theory of evolution. Through 21 hands-on activities, young scientists learn about Darwin’s life and work and assess current evidence of evolution. Activities...
With today’s modern technology—LEDs, servomotors, motion sensors, speakers, and more—artwork can incorporate elements of light, sound, and motion for dramatic effects. Author and educator Simon Quellen Field has...
Make no mistake: the US government’s hundred-year-old war on marijuana isn’t over. Some 20 million Americans have been arrested on marijuana charges so far. The American marijuana industry remains underground, where modern-day moonshiners who view themselves as...
One of the most elusive and controversial figures in NASA’s history, George W. S. Abbey was called “the Dark Lord,” “the Godfather,” and “UNO”—short for unidentified NASA official. He was said to be secretive, despotic, a Space Age Machiavelli. Yet Abbey had more influence...
