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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 the air around you. These…

Travel enthusiasts, who crave a holistic astronomy experience to give voice to their curiosity about the vast skies beyond our stratosphere, can gain an integrated astronomy experience through Astro Tourism, a trend that has seen an…

A pair of Australian elite SAS soldiers stand with their service weapons and an imposing military dog in front of a US Black Hawk helicopter in the mountainous Uruzgan province in Afghanistan.Behind the lens, US military photographer Gagan…

The school where this was taken is in a village in rural Uttar Pradesh, the state in northern India where I was born. It’s a poverty-ridden area and this is a poorly funded school, with few books and no electricity. My father taught there…