Article
Khan Academy

Khan Academy: Crick, Watson, and Franklin

For Students 9th - 10th
This article describes the race to unlock the mystery of life by determining the double helix structure of the DNA molecule. The discovery of DNA and its structure is an example of collective learning.
Article
Carnegie Mellon University

Telstar: The Sun and Its Energy

For Students 9th - 10th
The sun's energy is the primary source of energy for all surface phenomena and life on Earth. Combined with the material of the Earth (including the molecules held close by the Earth's gravitational force called the atmosphere), this...
Article
Carnegie Mellon University

The Sun and Its Energy

For Students 9th - 10th
The sun's energy is the primary source of energy for all surface phenomena and life on Earth. Combined with the material of the Earth (including the molecules held close by the Earth's gravitational force called the atmosphere), this...