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The 12 Most Aggressive Sharks
animals.howstuffworks.com/fish/sharks/most-dangerous-shark.htm
Dangerous sharks may not hunt humans, but if they took a sample bite, they could do some serious damage. Which 10 sharks make up the worst in the ocean?
How Cells Work
science.howstuffworks.com/life/cellular-microscopic/cell.htm
The human body is composed of about 10 trillion cells. Everything from reproduction to infections to repairing a broken bone happens down at the cellular level. Find out all about cells.