Ask The Science Experts

Every few months or so, my son and I like to make straight-chain polymers out of of polyvinyl acrylic (PVA) and sodium tetraborate. It’s pretty simple to do. You just mix one part PVA with one part dihydrogen oxide. Then make a solution of about 40 mg of Na2B4O7, and 400 cc of more dihydrogen […]

This is a tricky question and one that has befuddled many biologists for a long time. The easiest way, but not always 100% accurate, would be to find a frog near where you found the tadpoles and there’s a good chance they are the same species. If you can’t find an adult frog, do a […]