What Is High Blood Pressure?
High blood pressure is a blood pressure reading of 140/90 mmHg or higher. Both numbers are important. About one in every four American adults has high blood pressure. Once high blood pressure develops, it usually lasts a lifetime. The good news is that it can…
Continue reading →More science facts
Geology
Distant Mountains Influence River Levels 50 Years Later
Rainfall in the mountains has a major influence on nearby river levels, and its effects can be seen as much as…
Astronomy
The Real Lord of the Rings
Why is Saturn the only planet with bright, easily seen rings? Saturn is not the only planet in our solar…
Physics
How Fast is Mach 1?
Mach 1 is the speed of sound. A Mach number is simply the ratio of an object's speed to the speed of sound in…
Geology
Fossil Energy - The Basics
Contrary to what many people believe, fossil fuels are not the remains of dead dinosaurs. In fact, most of the…