Zomato CEO Deepinder Goyal has generated curiosity by wearing an experimental device called 'Temple,' designed to measure real-time cerebral blood flow. Goyal links the device to his 'Gravity Ageing Hypothesis,' suggesting gravity reduces blood flow to the brain over time. However, medical experts, including a radiologist from AIIMS, have criticized the device, stating it lacks scientific validation and is not a proven medical tool, cautioning the public against unverified health gadgets.