John Crimaldi is a professor of civil, environmental and architectural engineering at the University of Colorado, Boulder. Every time you flush a toilet, it releases plumes of tiny water droplets into ...

This summer, in Boulder, Colorado, John Crimaldi and his team of civil and environmental engineers gathered around a toilet — for science. They positioned a laser to beam green light above the lidless ...

Just like the great debate over which way the toilet paper roll goes, there is a similar spat over flushing: lid open or closed? Scientists have weighed in with their own woeful conclusion: Neither is ...