Why Aren’t All Calories Created Equal? A Dietitian Explains

A calorie is a calorie is a calorie, at least from a thermodynamic standpoint. It’s defined as the amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius (2.2 pounds by 1.8 degrees Fahrenheit).   But when it comes to health and your body’s energy balance, not all … Read more

Comet Leonard discoverer explains how the unusual object was found

Discovered nearly a year ago, Comet Leonard is on its final tour of Earth’s neighborhood, lighting up the night sky for viewers this holiday season.  Comet Leonard — the brightest and most anticipated comet of the year — was discovered by Gregory Leonard, a senior research specialist at the University of Arizona’s Lunar and Planetary … Read more

How Does Climate Change Affect Deadly Tornadoes? A Scientist Explains

The deadly tornado outbreak that tore through communities from Arkansas to Illinois on the night of 10-11 December 2021, was so unusual in its duration and strength, particularly for December, that a lot of people including the US president are asking what role climate change might have played – and whether tornadoes will become more … Read more