An MRI
A telescope or binoculars
A periscope is a device used for seeing a correct image from a hidden place
which measurement device is used tot take the circumference of the body
eyes
Posture to keep body the way others are comfortable of seeing is what we call a body posture.
Out of body experiences?
thermometer
You cannot
The thermometer.
Seeing, hearing, taste, touch, and smell.
hearing,tasting,smelling, and looking or seeing
by seeing there faces and body language