Scientists are growing miniature human brains in labs around the world. (Yep, you read that right.) For Wired, Claire L. Evans reports on the latest research in the field of organoid intelligence, or OI, where scientists are artificially growing brain organoids from tiny human samples, whether skin, blood, teeth, or even hair. As these seed-sized globs mature, they are able to send and receive electrical signals, and even learn to remember and anticipate them. In other words, this living matter is programmable. “And this is where things get truly weird,” writes Evans.
For now, these neural computers are mostly of interest to researchers who want to work with neurons without taking on the tedious wet-lab husbandry themselves. Eventually, however, the company hopes that neurons will prove themselves to be an energy-efficient, resilient substrate for more general computing applications—including some tasks currently handled by AI, like image recognition and classification.
“When you think about what you want from AI, it’s biology,” said Brett Kagan, Cortical Labs’ chief operating officer, when I reached him over Zoom. “You want it to be self-repairing as much as possible. You want it to be adaptable. You want it to be long-lived. You want it to be energy-efficient. These are all features you get for free in biology.”
“Sound is a tangible way of connecting to aspects of nature that are hidden from humans. The deep ocean, the dark night, and now the dense earth beneath our feet,” writes Ella Browning. And you can hear underground for yourself in the fascinating recordings she includes in her essay on earthworm “munching.” In this emerging field of soil ecoacoustics, researchers—including Browning—are finding links between ecosystem recovery and the character of underground soundscapes. Healthy soil literally sounds different. This piece will change how you view the ground beneath your feet.
A core principle of ecoacoustics is that complexly noisy natural places are healthier natural places. This means that it’s not just the volume of noise, but the diversity of sound that indicates habitat health. The dawn chorus in an intact Bornean tropical forest is magical in its complexity, especially if you’re lucky to experience it mixed in with the whoops of a troop of gibbons swinging through overhead, as I was during a visit in 2019.
In contrast, cities are generally not ecologically healthy and, while they are incredibly noisy places, they are filled with the harsh, more monotonous sounds of car engines and other machines, and often little biotic sound. Soundscapes dominated by anthropogenic sounds have been linked to poor mental health in people, whereas the opposite has been found for natural sounds like birdsong or forest soundscapes.
In this edition: in a pickle; gut feeling; king of pain; life (or something like it); for those about to rock.
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