Hey HN,<p>My ears always perk up when I hear about some interesting technologies. For example, I'm fascinated by real-time facial action analysis, DNA digital data storage, nuclear phone batteries, SS7, brain-computer interfaces, power analysis, and so on. These technologies may not make the headlines as often as artificial intelligence, but I still think they are very interesting.<p>I'm curious to hear from you: What are some technologies that you find most exciting or intriguing? What is it about these technologies that captures your attention?<p>I'm looking forward to discovering some hidden gems.<p>Thanks for sharing your thoughts.