Thought this image might be fun for teachers using Chapter 13 of Once Upon a Life Science Book. By the way, if you have a copy of the book from the first printing (you can find out on the copyright page), you have errors on pp. 130-131. The pages are correct in more recent printings, … Continue reading Socially Awkward Penguin
Is it gold? Gold is heavier than pyrite, so it should feel heavy in your hand. Stick a needle in it. Gold is soft, malleable, and won't chip. Likewise, the edges of its crystals smooth easily, so it's rare to find sharply defined crystals. Gold is shiny even when it is dry and in the … Continue reading Who wore it better? (the errata edition)
Once Upon a Science Book 