When daytime photons, which are rich in blue light, enter the retina, they ‘activate’ cells containing melanopsin.
| Photo Credit: Ron Lach/Pexels
— Sahitya Agrawal, Raxaul
A: The brain’s biological clock is a network of genes and proteins whose concentrations rise and fall in a roughly daily cycle.
Published – August 12, 2026 08:30 am IST
