Rediscovering Biology - Online Textbook. The online textbook chapters support and extend the content of each video, providing context for the focused examples presented in the video and showing how the examples fit into the larger field.
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Biology. Human Body Facts. Facts - moving, incredible, intriguing As you age, your eye color gets lighter.
There are 206 bones in the adult human body, but 300 in children (some of the bones fuse together as a child grows). The human eye blinks an average of 4,200,000 times a year.