I can be stored or set free, I can move mountains, yet you can’t see. What am I?

Category: Science · Difficulty: hard

Hint: Consider something that powers everything around us.

Answer

A form of energy

Explanation

Energy exists in various forms and can be harnessed or released but is not visible itself.

This is a hard science riddle — a tricky one that takes a little thought. The answer is A form of energy.

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