I measure time in cycles without any hands, yet my rhythm is profound. What am I?
Category: Science · Difficulty: medium
Hint: Consider what swings back and forth.
Answer
A pendulum
Explanation
A pendulum measures time through its swings, while a calendar keeps track of days, a stopwatch times events, and a sundial uses sunlight.
This is a medium science riddle — a moderate challenge for most people. The answer is A pendulum.
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