Animal mysteries of life: naked mole rats

This one, from Harper’s Findings, caused my mouth to drop open:

DNA can be sampled from the air of a room in which naked mole rats have been dwelling.

It’s from Harper’s Weekly Review, of course, but I have some questions.

1) Whose DNA?

2) How do (presumably) scientists grab that DNA? Do they run around the room brandishing Q-tips?

3) Why is the DNA in the air? I mean, what did the mole rats do to shed DNA — if indeed, the DNA is the mole rats’? This isn’t clear at all.

4) Aren’t all mole rats naked?

5) What is a mole rat?

6) Should I continue?

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