Did you know that June 29th is the day the world celebrates mud? This investigation, through a series of nine steps, seeks to answer the question, When Is Mud Dangerous? The study looks at mudflows, also called debris flows or mudslides, which are mixtures of water-saturated debris flowing downhill under the force of gravity. 

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From the sudden flash of light, the power of the thunder, and the fear of what it might bring, we have always been fascinated and awed by the phenomenon of lightning during a thunderstorm. As you recognize Lightning Safety Week during the last week of June, check out this resource that takes readers through the evolution of lightning detection technology. Learn about Alexander Popov's device that used radio waves, and how that lead to the advanced detection equipment of today. Also see how the images from the new GOES weather satellite's Geostationary Lightning Mapper can help meteorologists map and predict storm paths in the future.

[Floating and Sinking: Hot Air Balloons]

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Celebrate National Weatherman's Day on the 5th by learning from Nick Walker, the weather dude, how meteorologists predict the weather. Sing along with his song, find out the different methods to forecast weather, and complete weather based activities.

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