I am the remnants of the universe's first seconds, yet you can’t see me directly. What am I?
Category: Science · Difficulty: hard
Hint: I make up most of the universe's mass, but I don’t emit light.
Answer
Dark Matter
Explanation
Dark matter is a form of matter that doesn't emit or interact with electromagnetic radiation.
This is a hard science riddle — a tricky one that takes a little thought. The answer is Dark Matter.
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