I can make oceans rise and fall, yet I am invisible. My influence is felt by all bodies of water. What am I?

Category: Science · Difficulty: expert

Hint: Consider what celestial body affects tides.

Answer

Moon's gravitational pull

Explanation

The gravitational pull of the Moon affects the Earth's oceans, causing the phenomenon of tides.

This is a expert science riddle — one of the harder riddles here. The answer is Moon's gravitational pull.

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