Can you tell me about the different techniques used to play string harmonics on the cello?

String harmonics on the cello are produced by lightly touching the string at specific points while bowing, creating a higher pitch than the regular notes. Techniques include natural harmonics, artificial harmonics, and pinch harmonics. Natural harmonics are played by lightly touching the string at specific nodal points, while artificial harmonics involve using two fingers to create the harmonic. Pinch harmonics are created by plucking the string with the thumb while touching it lightly at a specific point.