This is an old trick done with fine steel wool to make a huge spiraling shower of sparks. Rapid oxidation of iron contained in the fine strands of steel is an exothermic reaction hot enough to provide ...

NAPERVILLE, Ill. -- Jessica Wolfe carefully untangled, smoothed out and fluffed up a small clump of light brown, tan and black wool as she prepared it to be spun into yarn. Jessica, a fifth grader ...