Curious Kids[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to This email address is being protected from spambots. You need JavaScript enabled to view it.[2].What is rust? – Henry E., age 13, Boston, Massachusetts Imagine leaving your shiny metal bicycle outside in the rain. As water pools on its surfaces, oxygen from the air
Curious Kids[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to...