Your DNA could stretch to Pluto and back 17 times.
Why it is true
If you unraveled the DNA in all your cells and tied them together, the strand would be about 10 billion miles long.
Source: Biology
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.