Science Friday Initiative
Science Friday: The Incredible Shrinking Proton?
New measurements from a group of physicists indicate that the proton may be about 4 percent smaller than previously thought. But what does that mean?
Sophia Learning
Sophia: Atomic Number: Lesson 2
This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 2 of 7 in the series titled "Atomic Number."
Other
You Tube: Where Does the Sun Get Its Energy?
The sun has been producing light for about five billion years but where does all its energy come from? The most common idea is that the sun is burning gas - like a giant fireball in the sky. If this were true, the sun would have gone out...