If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

Learning is generally most effective when there is a healthy mix of theory as well as hands on learning through experiments or demonstrations. In most cases because of limited equipment available or ...