As much as we want to stay alert throughout the day, feeling tired from time to time is inevitable. A neuroscientist recommends a simple brain hack if a power nap isn’t an option when you’re too tired to function. While lack of sleep can cause several problems, including increased crime in society, feeling sleepy in the middle of the day can be challenging too. So try this exercise when you feel exhausted next time. ‘Brain hack’ may seem ‘silly’, says neuroscientist American neuroscientist Andrew Huberman’s simple hack to stay awake and alert whenever you’re tired or sleepy has gone viral on T…