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Health and science dominate Friday's show, as we examine the potential impact of head trauma, germy public places, and efforts to track a great white shark.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=BlkQoFgqc9g:VMqz63GgJDE:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=BlkQoFgqc9g:VMqz63GgJDE:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=BlkQoFgqc9g:VMqz63GgJDE:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=BlkQoFgqc9g:VMqz63GgJDE:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=BlkQoFgqc9g:VMqz63GgJDE:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=BlkQoFgqc9g:VMqz63GgJDE:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=BlkQoFgqc9g:VMqz63GgJDE:gIN9vFwOqvQ)
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