![](http://static.ddmcdn.com/gif/recipes/smallest-free-living-insect-151009-200-1.jpg)
According to a Moscow researcher, the search, and debate are over concerning which free-living bug is the tiniest.
![](http://static.ddmcdn.com/gif/recipes/extendable-jaw-151009-200.jpg)
The ability, known as protrusion, allows fish to extend their
jaw and snap up otherwise elusive prey, making them effective hunters.
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