I am crucial to life, yet you cannot see me. I flow in currents but make no sound. What am I?

Category: Science · Difficulty: hard

Hint: Think of what powers your devices silently.

Answer

Vital force

Explanation

Electricity is essential for life in modern terms, flows in circuits, and remains invisible to the naked eye.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Vital force.

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