Tying a key on a kite, to 'catch' lightning Training a dog to expect food when it hears a bell Observing the web-spinning styles of spiders on LSD Dropping different-sized weights from the Tower of Pisa Searching for extraterrestrial signals from the cosmos at the W. M. Keck Observatory on the summit of Mauna Kea, Hawaii Making a sugar snake from powdered sugar and baking soda ▶ Next Question ◀