Reader Mark Skelton asks:

I know neutron star material is some of the most dense matter in the universe, with a teaspoon weighing as much as a mountain. What would happen if we could in fact extract this material from a neutron star?

Let me start with this: DO NOT TRY THIS EXPERIMENT.

Though the name "neutron star" seems innocuous enough, beware. They are tiny, but deadly remnants of massive stars. Though they are two to three times the mass of the sun, they are compact enough to fit (relatively comfortably, actually) inside the borders of Philadelphia.

 

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