Colin Powell served two combat tours in the Vietnam conflict and earned three medals for his service. Although Powell broke his ankle in a helicopter crash, he rushed back into the wreckage again and again to save the lives of Gettys,...

Describes scientific research that has revealed new information about the size and shape of the Milky Way.

Step-by-step illustrated directions on how to make a stunning 3D paper star-shaped snowflake.

Explains what galaxies are and their different shapes. Includes details on the Milky Way.

An article about the Planetary Science Institutes's advanced computer software, which it uses to model the way the solar system may have formed. Includes some insights into the results already obtained.