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Learn how to build a simple solar cell at home using copper tape, plastic cups, and water. This step-by-step science experiment demonstrates how to harness solar energy to generate electricity.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." I came up with this recipe up on the fly last year, after a friend texted me in a full Thanksgiving panic ...

You know those dusty cardboard boxes in the attic that you inherited and you swear you’ll “go through next year”? Some of that old Christmas junk might actually be paying your winter heating bill. Or ...