I build cities and bridges, yet you cannot see me. I hold the universe together with my invisible hands. What am I?

Category: Science · Difficulty: hard

Hint: Consider the force that keeps planets in orbit.

Answer

Gravity Force

Explanation

Gravity is the force that attracts objects toward one another, keeping celestial bodies in their orbits and giving structure to the universe.

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

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