Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...

The heart is a pump, and the blood goes round, and round, and round all the time. And why does it do that? Why can't it just have a rest? Well, the blood has to be kept moving around all the time ...

Dec. 15, 2025 Natural killer cells act as the immune system’s rapid-response team, but the stress of anxiety and insomnia may be quietly thinning their ranks. A study of young women in Saudi Arabia ...

People often look around without a specific task in mind (free viewing). Here, the authors demonstrate that free viewing eye movements aim to understand scenes by frequently focusing on people and ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Michael Boyle is an experienced financial professional with more than 10 years working with ...

The digestive system is like a big food factory inside our bodies. Its job is to break down the food we eat into smaller pieces so that our bodies can absorb the nutrients from the food to help us ...

Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder most frequently diagnosed in children. According to the Centers for Disease Control and Prevention (CDC), ADHD ...

From "The Twelve Days of Christmas" to "Jingle Bells," this playlist has it all. Written by: Dec. 23, 2025 There was no proof the DOJ redacted the document after posting it. In fact, there was a copy ...