When Zomato CEO Deepinder Goyal appeared on Raj Shamani’s podcast, many viewers weren’t focused on the conversation at all. Instead, their eyes were fixed on something unusual, a small metallic clip attached to the side of his head. This wasn’t the first time the device had been spotted. Goyal had earlier been seen wearing the same gadget at a Feeding India event, quietly sparking curiosity even then. Soon after, social media did what it does best. Some users joked it looked like chewing gum, others compared it to an external SSD or even a brain charging device. But behind the memes was a much bigger discussion, one linked to Goyal’s controversial idea called the ‘Gravity Ageing Hypothesis.’ Also read: Samsung introduces world’s largest Micro RGB TV, the 130-inch TV can be mounted directly on wall
The Gravity Ageing Hypothesis: Why the debate began Zomato founder Deepinder Goyal had earlier sparked an online debate after sharing his Gravity Ageing Hypothesis on X. The idea, in simple terms, suggests that the constant pull of Earth’s gravity may contribute to human ageing.
According to Goyal, gravity affects how blood flows to the brain over time, which could play a role in ageing and cognitive decline. The theory received heavy criticism from doctors and scientists, who questioned both the logic and the lack of scientific evidence. It is in this context that the mysterious device on Goyal’s head, called ‘Temple,’ becomes important. What exactly is the ‘Temple’ device? The device seen on Goyal’s head is called Temple. It is a clip-like, metallic wearable that he claims can measure blood flow in the brain in real time. According to Goyal, Temple tracks cerebral blood flow (CBF), the movement of blood through the brain. He has compared its functioning to a miniaturised MRI, saying it can continuously monitor brain blood flow without the need for large machines. Also read: How Elon Musk’s AI sparked a global storm over safety, here’s all about this controversy
Why is Deepinder Goyal using it? Goyal says he has been wearing Temple for over a year as part of his personal research into ageing. Explaining the reason behind the device, he said: While researching the Gravity Ageing Hypothesis, we had to make an experimental device to calculate Brain Flow accurately, in real-time, and continuously. He also claimed that using the device made him feel it could eventually become “an important wearable the world needs.” Note: The above video has been taken from Raj Shamani Clips and is subject to the rights of the original owner only.
Is Temple a Zomato product? No. Temple is not a Zomato product. The device is a research prototype being developed under a health-tech startup also named Temple, which is linked to Goyal’s broader initiative called Continue Research. This project focuses on understanding human ageing and biological health. Goyal has announced $25 million (around ₹225 crore) in funding for research related to longevity and ageing. As of now: Goyal has hinted that the device is “getting there,” but no timeline has been shared. Also read: Tiny robots that can think, move, and even heal themselves
What do doctors and experts think? Many medical experts are sceptical. A doctor from AIIMS Delhi reportedly called Temple a “fancy toy”, questioning its scientific value. Radiologist Dr Suvrankar Datta, who trained at AIIMS, publicly criticised the device, saying: This device currently has zero scientific standing as a useful device.
Experts argue that accurate real-time measurement of brain blood flow typically requires complex imaging systems, and there is no proven scientific evidence that a small wearable can reliably do this. Doctors have also warned people not to fall for unverified health gadgets that are not backed by peer-reviewed research. The backlash and Goyal’s response After facing widespread criticism over the Gravity Ageing Hypothesis, Goyal later admitted that he had miscommunicated his ideas. Goyal clarified that even if the gravity theory turns out to be wrong, brain blood flow is already accepted as a biomarker for ageing, cognition, and longevity, which still makes research in this area relevant. Also read: India tops global ‘AI Advantage’ index, beats world average
So, should you take Temple seriously? For now, Temple remains an experimental device, closely tied to a controversial ageing theory.
Whether it becomes a genuine breakthrough or remains a headline-grabbing curiosity will depend entirely on independent scientific evidence, not podcasts or viral clips. Until then, the internet jokes may continue, but the science is still catching up.
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