An eagle's vision is up to 8 times sharper than a human's.
Why it is true
They have massive pupils and a high density of light-sensitive cells in their retinas, allowing them to spot a rabbit from nearly 3 kilometers away.
Source: Ornithology
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.