Animal echolocation in the external ear. There are two hypotheses about the evolution of echolocation in bats. The first suggests that laryngeal echolocation evolved twice in Chiroptera, once in the Yangochiroptera and once in the horseshoe bats (Rhinolophidae). The second proposes that laryngeal echolocation had a single origin in Chiroptera, was subsequently lost in the family Pteropodidae (all megabats), and later evolved as a system of tongue-clicking in the genus "Rousettus". Individual bat species echolocate within specific frequency ranges that suit their environment and prey types. This has sometimes been used by researchers to identify bats flying in an area simply by
This Type of Thinking (Could Do Us In) This Type of Thinking (Could Do Us In) This Type of Thinking (Could Do Us In) is the third studio album and second major label release by American alternative metal band Chevelle. Peaking at No. 8, it charted higher on the "Billboard" 200 than its predecessor, "Wonder What's Next"; however, the album didn't manage to match its predecessor's commercial success, but was certified gold. "This Type of Thinking" follows generally the same heavy style as "Wonder What's Next" with popular singles like "Vitamin R" and "The Clincher". It would be the first of two records produced by Michael "Elvis" Baskette.