Sunscreen Science

Sunscreen Science

Imagine a day of frolicking at the sunny beach—one of the joys of summer! While writing The Mystery of Science: Astronomy, I learned about our Sun and the amazing way it provides just the right amount of light and warmth to sustain life on Earth. Sunlight contains not...
The Design of Density

The Design of Density

Sometimes when we talk about 2 people who don’t get along, we might say they are like oil and water. We mean they don’t mix well together. Have you ever tried to mix oil and water? Even if you stir or shake the solution, the oil and water eventually separate. Have you...