A Moment of Science
Every season several football players miss a number of games after absorbing vicious blows to the head.
In recent years, scientists have seen more and more cases where memory loss isn't just a natural consequence of aging. Sometimes it's caused by other factors.
Did you know that sleep walking has nothing to do with neurological problems or disorders? Learn more on this Moment of Science.
Millions of monarch butterflies fly southwest from eastern Canada and the United States down to Mexico each autumn; then millions more fly back to the northeast in the spring.The one-way trip is as long as 2500 miles for some of these creatures.
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