New Delhi, Mar 12 Ever wondered why humans can read? A team led by Kolkata-born scientists has found that a special sweet spot in the eye called ‘fovea’ plays a crucial role in humans being able to to focus on computer screens and also read, an ability which is unique to Homo sapiens. Raunak Sinha and Mrinalini Hoon describe themselves as a ‘scientist couple’ who push the frontiers of neuroscience to better understand vision.