RUTH KASSINGER is a writer, teacher, and consultant. She is the author of Wiley”s Reinvent the Wheel and has written many articles on science and technology for such publications as the Washington Post, Smithsonian, and Science Weekly.
2 كتب إلكترونية بواسطة Ruth Kassinger
Ruth Kassinger: Build a Better Mousetrap
Discover the secrets behind some amazing inventions!
Through observation, experimentation, and perseverance, humansthrough the ages have managed to solve a whole array of perplexingproblems. These …
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Ruth Kassinger: Bloom
Say ?algae’ and most people think of pond scum. What they don’t know is that without algae, none of us would exist. There are as many algae on earth as stars in the universe, and they have been …
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