Sunday Special: Students unveil affordable hearing aids

Welcome back, Superhuman. Hearing aids remain out of reach for millions of people living with hearing loss because they’re too expensive. Now, a group of Canadian students is rethinking the entire model by taking a radical, new spin on the technology, pulling the price down to $20 a piece. Meanwhile, a breakthrough surgery is breaking new ground in brain-computer interface (BCI) technology.

1. Students replace hearing aid electronics with mechanical parts: A team of students has reimagined hearing aid design from the inside out, swapping pricey electronic components for mechanical parts that physically replicate the inner ear. They’ve built a custom-fit device that sells for $20, a fraction of the $1,000–$5,000 industry standard. It's a clever workaround that could reach patients currently priced out. An introductory glimpse of the tech has generated a lot of excitement online. You can see it here.

2. Patient feels phantom finger movement after world-first BCI surgery: Standard BCIs tap the motor cortex to trigger basic muscle commands. Scientists took this one step further, implanting a BCI in higher-cortex regions that handle intent and decision-making for the first time ever. Recipient Brandon Patterson, paralyzed for years, is already experiencing phantom sensations in his hands. The team says the long-term study could unlock therapies for paralysis, dementia, mood disorders, and cognitive impairments.

3. Scientists bottle sunlight in a "rechargeable sun battery": Storing solar power after dark typically requires expensive battery systems. Now, scientists have created a liquid molecule that absorbs sunlight, remains charged for months, and releases the energy as heat when triggered. Inspired by the reversible shift of photochromic sunglasses, the material surpasses lithium-ion batteries in energy density and could potentially be used in rooftop collectors that capture sunlight by day and heat homes overnight.

4. Thailand unearths Southeast Asia's biggest-ever dinosaur: A villager's fossil discovery in northeastern Thailand has revealed a 90-foot, 28-ton sauropod that roamed the region 113M years ago. Named after the serpent deity Naga from Thai religious tradition, the long-necked plant-eater browsed treetops with little fear of predators (the area's largest carnivore weighed just 3.5 tons by comparison). It marks the largest and geologically youngest sauropod ever identified in Southeast Asia.

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4. Clicks Communicator: A tactile phone for when you just want to stay in touch. It packs a full QWERTY keyboard and cellular connection so you can leave your main phone behind.

🚲 Off the Ground: What if cycling hard enough didn’t just push you forward—but actually pulled you off the ground? A 2019 video of a student briefly lifting off in what looks like a flying bicycle has resurfaced, racking up over 2.5M views online. One user has an important question: "All I'm thinking about is what if I get a cramp mid-air?”

💥 Big Boom: In 1951, the Soviet Union’s RDS-3 nuclear test lit up the sky with a massive blast that would go on to become the defining image of the atomic age. Here’s a chilling clip of the test in action.

🌍 Swing State: Sometimes the simplest experiments are the most profound. In 1851, a French physicist walked into the Panthéon, hung a metal ball from the ceiling, and settled one of the biggest scientific debates of the time. You can check it out here.

👀 Shake It Up: Earthquakes are the result of years of built-up strain released in an instant. This deceptively simple Japanese model makes the science behind the destructive phenomenon almost impossible to forget.

⚔ Sword Flight: Ancient Chinese myths have long imagined warriors gliding through the skies on flying swords. Now, a Chinese vlogger has seemingly recreated the idea as a working, rideable machine, and it’s going viral on social media. Watch it in action here.

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Pressure Control: Millions of patients take three or more medications and still can't control their hypertension. Now, scientists have developed CaroFlex, a soft implant that wraps around the carotid artery and lowers blood pressure with gentle electrical pulses. In rat trials, CaroFlex reduced blood pressure by more than 15%, potentially enabling personalized implants for cardiovascular disease and other chronic conditions.

Power Problem: Scientists have successfully restored memory in dementia-stricken mice by boosting the activity of mitochondria, the tiny energy generators inside neurons. The team showed a direct cause-and-effect link between mitochondrial failure and cognitive decline for the first time. The finding suggests Alzheimer's symptoms may stem partly from neurons running low on energy, opening a fresh target for future treatments.

Zombie Killer: Senescent cells quietly fuel cancer, Alzheimer's, and aging, and spotting them in the body has been nearly impossible. Now scientists have used tiny folded DNA molecules called aptamers to tag these zombie cells with precision. Sparked by a chat between two grad students from different labs, the team sifted 100 trillion DNA sequences to find ones that bind senescent cells. Aptamers are cheaper and more adaptable than antibodies, opening doors for targeted future therapies.

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Zain, Faiq, and the Superhuman AI team