Look at the life cycle of a star on this easy to understand infograph.

Studying mosses? Here is a great animation on the reproductive cycle of a moss.

Use these images to study the monarch butterfly's life cycle.

This site has a diagram of the life cycle of the malaria parasite.

Provides a look at the development of a chick during each day of the 21-day chick lifecycle. Gives detailed information about the major events that happen each day in the development. Contains many photographs of real chicks in...

Use this tutorial to enhance your understanding of how the human immunodeficiency virus invades healthy cells of the immune system. [3:15]

Follow the route of a cell phone from the beginning to the end in this article.

Site full of beautiful butterfly photographs including the emerging of a butterfly. One link also provides detailed information on the life cycle of a butterfly as well as a quiz to complete when finished.

Visit this website to read about the extinctions that have occured throughout Earth's history. Provided are links to very brief summaries of the extinctions (minor and major) that occured during specific periods of time.

This site has a diagram of the life cycle of the malaria parasite.

The cell phones have dramatically changed our way of life but at what cost? Learn the cons to these powerful machines in this article.

Get a view of all types of stars in this gallery. Learn about the life and death of stars in this gallery too.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

A great review of these interesting insects, many of which are on a 13 or 17 year cycle of life. Great pictures and information.

The life cycle of an apple tree is shown in this diagram.

This collection of six images captures the magnificence of human development -- the transformation from baby to woman.