1.   But there is no reason why both these and other sensory systems should not be employed.

2.   Either they need a similar sensory system or, alternatively, human helpers.

3.   That male displays should be suited to the sensory systems of females is only to be expected.

4.   And what is the molecular explanation for the way in which odors excite the olfactory sensory system?

5.   But in recent weeks, Joseph Hart, a programmer who works with Ray, found bugs in the code for implementing the sensory system.

6.   Finding a sensory system for pleasurable caresses was a complete surprise, he said in an interview.

7.   Hunting for food at night, however, bats use echolocation, a sensory system based on sound that allows them to avoid objects and locate food.

8.   In the past, researchers have studied both the signals that males send to females and the sensory systems of females that perceive those signals.

9.   More important, the new discovery illustrates how researchers are uncovering the biochemical foundations of the sensory system.

10.   The next step, he said, is research involving other sensory systems.