Six wild ideas for perpetuating your mind
Have you ever thought about what makes you you? Science assures us it has everything to do with the three-pound organ between our ears, with its billions of neurons and trillions of delicate connections. But it’s a lot trickier to explain why we have a sense of self-awareness or to pin down precisely where that….
Your sense of self comes from your brain, a three-pound organ with billions of neurons and trillions of connections. While science can locate memories and functions in specific brain regions, the exact nature of self-awareness remains unclear. As people age, most memories fade, yet the continuity of identity persists. For example, a person at 30, 50, or 70 still feels like the same individual despite these changes. Some researchers and technologists are exploring ways to preserve this continuity beyond natural lifespans, including radical methods like freezing brains or uploading memories to computers. These efforts raise ethical and technical questions about what it means to preserve the mind.
Head transplants, also called body transplants, involve transferring a person’s head to a donor body. The idea gained attention in 1970 when neurosurgeon Robert White transplanted a monkey’s head onto another monkey’s body, though the spinal cord was severed, leaving the head unable to control the new body. In 2026, controversial surgeon Sergio Canavero claimed spinal cord fusion is possible, citing a 2026 study where pigs regained limited mobility after spinal cord surgery using a surgical sealant. Critics, like spinal rehabilitation specialist Grégoire Courtine, dismiss these claims, stating no technology exists to achieve such a procedure. Ethical concerns also arise, as volunteers might end up paralyzed or dependent on life support.
Mindclones are digital avatars created by uploading personal data like diaries, recordings, and social media history into AI software called mindware. Futurist Martine Rothblatt popularized this concept in her 2014 book Virtually Human. Today, services like StoryFile, Afterlife AI, and Synthesia generate realistic AI clones that mimic voices and appearances. These avatars can converse or act as stand-ins for influencers or deceased loved ones. While they may feel emotionally real to users, there is no evidence they possess true self-awareness. In 2025, Rothblatt’s digital avatar, Marvatar, participated in a UCLA event, demonstrating how AI can simulate human interaction. The lack of a clear definition of consciousness complicates determining whether these avatars are truly conscious.
The idea of keeping a brain alive outside the body in a jar, popularized by the 1983 film The Man with Two Brains, is being tested by the company Bexorg. Bexorg preserves human brains from organ donors by infusing them with oxygen-rich artificial blood, claiming the brains remain metabolically active. However, the company states these brains lack coordinated electrical activity, meaning they are not conscious. Bexorg adds the anesthetic propofol to ensure unconsciousness. Currently, brains can only be kept
Gradual brain replacement involves slowly replacing aging brain cells with lab-grown, youthful tissue to combat cognitive decline. In 2026, the US government’s ARPA-H agency committed up to $175 million to a program called FRONT (functional repair of neocortical tissue) to develop this technology. The goal is to manufacture functional cortical tissue to graft into stroke victims’ brains, restoring function. Neuroscientist Jean Hébert, who leads the program, argues that replacing brain cells gradually could extend lifespan by reversing aging damage. The project aims to create complex chunks of young cortex, similar to fetal brain tissue, within five years. Skeptics question whether these replacements will integrate properly or retain memories.
The connectome is the complete map of neural connections in the brain, where memory and identity are believed to reside. Princeton neuroscientist Sebastian Seung’s 2012 hypothesis states, “You are your connectome.” Scientists are already mapping simpler brains, like a 2024 project that traced 139,255 neurons and 55 million synapses in a fly brain. Whole-brain emulation, or uploading, aims to create a digital simulation of a brain so detailed it replicates an individual’s memories and identity. A 2025 survey of 312 neuroscientists estimated human whole-brain emulation won’t be possible before 2125. Companies like Nectome and Sparks Brain Preservation offer to preserve brains for potential future uploads by infusing them with chemicals used to preserve fruit fly brains for connectome mapping.
A *synthetic neocortex* refers to an artificial brain region that could be added to a human brain to enhance cognitive abilities. Futurist Ray Kurzweil predicts advanced nanobots could link brain cells to a synthetic neocortex in the cloud, providing unlimited processing power. In 2024, Science Corporation introduced a *biohybrid* brain-computer interface where nerve cells grown on a digital chip communicated with an animal’s brain. This technology could treat conditions like Parkinson’s by directing brain cells to produce dopamine. Max Hodak, CEO of Science Corporation, likens the biohybrid interface to a *“big, externalized cranial nerve.”* Entrepreneurs like Daniel Burger, founder of Eightsix Science, suggest combining multiple brain-saving techniques, such as brains in vats and biohybrid grafts, to eventually create an immortal machine.
