Hammerhead Shark Study Shows Cascade of Evolution Affected Size, Head Shape

• hammer head sharks were on the earth 20 million years ago
• through the years the hammerhead shark's head changed in size and shape
• the ancestor of the hammerhead shark was most likely larger
• through divergent evolution, it branched into the eight species of hammerhead known today

http://www.sciencedaily.com­ /releases/2010/05/100518113132.htm

Reflection:

This article relates to my biology class in many different ways. We studied divergent evolution and convergent evolution. This species of shark, the hammer head, underwent divergent evolution. This is the process when one species branches into two due to different environmental pressures. This article is another interesting article. Imagine what the early species of hammerhead shark was before it diverged into the current eight species. The idea of a larger shark in the water is a frightening one. I thought that this article was a nice article to share.

University of Colorado at Boulder. "Hammerhead Shark Study Shows Cascade of Evolution Affected Size, Head Shape." ScienceDaily 18 May 2010. 18 May 2010 /releases/2010/05/100518113132.htm>.