Listverse has information about 10 strange studies that scientists have conducted, such as how breasts bounce while women jog, can sheep recognize each others' faces, and flatulating fish. From the latter:
Two teams carried out this research project. One studied Pacific herring in Bamfield, British Columbia, while the other focused on Atlantic herring in Oban, Scotland. It was discovered that the Atlantic and Pacific herring create a mysterious underwater noise. It turns out that the high-frequency sound was created by releasing air from their anuses. The noise was always accompanied by a fine stream of bubbles. Researchers suspect herring hear the bubbles as they’re expelled, helping the fish form protective shoals at night.
The link is just a smidgen NSFWish because, well, I guess scientists are kinda pervy.
Link via The Presurfer