0 something that is impossible or extremely difficult to find, especially because the area you have to search is too large: --
This is most common with myths involving building an object that can accomplish a goal (for example, rapidly cooling a beer, or finding a needle in a haystack).
It was like finding a needle in a haystack.
The odds of recovering them in the landfill are said to be greater than a needle in a haystack.
However, they have been enveloped by so many words that the point of the probe has been lost as effectively as a needle in a haystack.
The police have to look for a needle in a haystack.
It is like hunting for a needle in a haystack.
Tracking down cyber-crooks is like looking for a needle in a haystack.
Any form of static check unrelated to good intelligence is like looking for a needle in a haystack.
