I want to know the answer to the following question:
The suprachiasmatic nucleus is a small part of what part of the brain?
All the background I'm provided with is that "The SCN continues to keep time even if it is excised from the brain and placed in a dish of warm nutrient solution, but it ordinarily receives input from the optic nerves, through the retinohypothalamic tract (RHT), that allows daily light-dark cycles to calibrate the clock.". Is that enough to answer the question?