I am the reason for seasons, yet I cannot be touched. What am I?
Category: Science · Difficulty: expert
Hint: Consider the axis of a spinning object.
Answer
The tilt of Earth
Explanation
The tilt of Earth's axis causes the seasons by changing the angle at which sunlight hits the surface throughout the year.
This is a expert science riddle — one of the harder riddles here. The answer is The tilt of Earth.
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