They use there brain to do it.
sex
It should detect anything other than heart worm.
Worm. Because of its wavy movement the worm can move faster than a turtle.
You can detect a liar by looking at the movement of his lips.
very very hot
A Seismograph.
The use of worm or worm gears in the working of a machine allows for the exchange of energy for torque or movement.
by the ear drum vibrating
An ant
yes
It senses any human movement
GPS transmitors are used to detect the slow movement of the tectonic plates.