I exist in endless cycles, I can change speed but never stop, I am an essence of reality. What am I?

Category: Science · Difficulty: expert

Hint: Consider the concept that defines existence and change.

Answer

A time flow

Explanation

Time flow is the continuous progression of events, integral to understanding movement and change in the universe.

This is a expert science riddle — one of the harder riddles here. The answer is A time flow.

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