Mary Hrovat began working toward a history degree at Phoenix College but later switched to astronomy and earned a bachelor’s degree in astrophysics at Indiana University. She has also completed some graduate coursework in astronomy and history of science. Her work as a writer and editor reflects her interest in both science and history. Perennially intrigued by the emergence and behavior of conscious matter, she writes about the human mind, emotion, human evolution, and related topics. She also writes about the history of science. Email: mhrovat [at] gmail.com
Website: https://maryhrovat.com/
by Mary Hrovat In 2018, Earth picked up about 40,000 metric tons of interplanetary material, mostly dust, much of it from comets. Earth lost around 96,250 metric tons of hydrogen and helium, the lightest elements, which escaped to outer space. Roughly 505,000 cubic kilometers of water fell on Earth’s surface as rain, snow, or other…
by Mary Hrovat Before the second was defined in terms of the characteristics of the cesium atom, before leap seconds or leap days or Julian dates or the Gregorian calendar, before clocks, even before the sundial and the hourglass, there were sunrise, sunset, and shadows. I’ve been thinking about timekeeping using shadows because a tulip…
by Mary Hrovat It could almost be a question on a very meta personality quiz: Do you prefer the Myers-Briggs typology or the Big Five personality traits? The Myers-Brigg Type Inventory is a popular tool that was developed outside of the scientific establishment by two women who did not have credentials in psychology. It’s qualitative…
by Mary Hrovat Every October there’s a huge book fair in my town, where used books donated by the community are put up for sale in a large hall at the fairgrounds. It’s no exaggeration to say that it’s a high point of my year. When I walk in and see table after table laden…
by Mary Hrovat It’s a Saturday in May. I’m 17, and I’ve spent the morning washing and waxing my first car, a 1974 Gremlin. I’m so delighted that I drive around the block, windows down, Chuck Mangione playing on the radio. Feels so good, indeed. I’ve successfully negotiated a crucial passage on the road to…
by Mary Hrovat I’m tempted to describe Marion Milner’s book A Life of One’s Own as the missing manual for owners of a human mind. However, it’s not didactic or prescriptive. In fact, it’s useful mainly because it’s nothing like a manual or a self-help book. The book is more like an insightful travelogue by…