Melany Z
Melany Z asked Neil deGrasse Tyson:

What do you think Dark matter is made of?

Neil deGrasse Tyson Would be fun if it were regular matter in a parallel universe whose gravity is spilling into ours, leaving us to think of it as a mysterious substance. But the betting person's answer is that it's an exotic particle that interacts gravitationally with our particles, but not in any other way. Top people are working on that now, in search of a Dark Matter particle.

In my books Astrophysics for People in a Hurry and in my earlier book Death By Black Hole and Other Cosmic Quandaries, I devote some attention to Dark matter and its mysterious ways.

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