New Delhi, Jan. 4 -- When Deepinder Goyal appeared on Raj Shamani's podcast on YouTube, he answered many hard questions. What everyone noticed was a small device the Eternal CEO was wearing on his temple.

As curiosity grew, even Reddit users began to wonder what the device was. Funny assumptions began.

"Chewing gum," one user said while another commented, "External SSD." One user joked, "Pimple patch."

One user wrote, "After chewing bubblegum, he didn't know where to stick it. Then he did this."

"It's his brain," quipped another.

There were many other comments like "Mind Jewels", "Brainwashing" and "Charging pads".

In reality, what Deepinder Goyal was wearing on his temple is called 'Temple'. It's an experimental device designed to ...