You can detect a liar by looking at the movement of his lips.
A Seismograph.
They use there brain to do it.
by the ear drum vibrating
An ant
It senses any human movement
GPS transmitors are used to detect the slow movement of the tectonic plates.
they have machines that can detect movement in tectonic plates
creep meter
Yes, and often is.
ants
Most can detect movement ten feet away, however some can detect twenty or thirty feet.