Tuesday, April 21, 2026 - Today's science news spans the cosmos and the cemetery, from black hole jets burning with the power of 10,000 suns to 5.5 million bees quietly thriving beneath a New York graveyard. Plus: a nasal spray that may actually reverse brain aging, and a geological puzzle that stumped scientists for two centuries - finally cracked.

A stunning new study has revealed that jets launched by black holes carry an almost incomprehensible amount of energy - equivalent to the power of 10,000 suns. These jets, which shoot out from the regions surrounding supermassive black holes, have long fascinated astronomers, but this new research puts their sheer scale into jaw-dropping perspective.

The findings help scientists better understand how black holes influence the galaxies around them - a process known as "feedback." When jets this powerful blast through a galaxy, they can heat gas, suppress star formation, and fundamentally reshape a galaxy's evolution over billions of years.

Speaking of cosmic violence - a nearby galaxy has been revealed to be in a state of stunning disarray, and scientists now believe a catastrophic galactic collision is to blame. The crash appears to have scrambled the galaxy's structure, disrupting normal patterns of star formation and gas distribution in ways researchers are still working to untangle.

What makes this discovery particularly exciting is how close to home it is. Studying a chaotic post-collision galaxy in our cosmic neighborhood gives astronomers a rare front-row seat to processes that shaped countless galaxies - including, potentially, our own Milky Way - across the history of the universe.

In what could be one of the most significant neuroscience stories of the year, scientists say they have found a way to reverse brain aging using a nasal spray. The delivery method is surprisingly elegant - the nasal passage offers a relatively direct route to the brain, bypassing many of the barriers that make brain treatments notoriously difficult to develop.

The implications here are enormous. Age-related cognitive decline affects millions of people worldwide, and current treatments offer limited help. A non-invasive spray that can meaningfully roll back the clock on brain aging - if these findings hold up in further trials - could transform how we approach conditions like dementia and memory loss.

Here's a mystery that has puzzled geologists since the early 1800s: dolomite, a common rock mineral found all over Earth, simply refuses to form under normal conditions in the lab - even though ancient rocks show it formed abundantly throughout Earth's history. Scientists have finally cracked this 200-year-old enigma, and the answer was hiding in the chemistry all along.

Understanding how dolomite actually forms matters beyond academic curiosity. Dolomite formations are tied to ancient ocean chemistry, carbon cycling, and even oil and gas reservoirs. Solving this puzzle could sharpen our models of Earth's past climate and improve our understanding of how carbon moved through ancient seas - with real implications for climate science today.

In a story that is equal parts eerie and extraordinary, researchers have discovered 5.5 million bees living in a vast colony beneath a New York cemetery. The scale of the find is remarkable - millions of bees quietly humming away underground, unseen beneath the headstones above.

Far from being a cause for alarm, the discovery is being celebrated as a sign of ecological resilience. Bees are critical pollinators under pressure worldwide, and finding such a massive thriving colony in an urban setting highlights how cemeteries and other low-disturbance green spaces can serve as unexpected wildlife refuges in the middle of cities.

Could the ground beneath your feet power a sensor network or environmental monitor? Scientists have developed a dirt-powered fuel cell that harnesses the natural microbial activity in soil to generate electricity. The technology taps into the chemical energy produced by microbes as they break down organic matter - energy that has always been there, just waiting to be captured.

The potential applications are genuinely exciting. Soil-based power could replace batteries in remote sensors used for agriculture, environmental monitoring, or disaster response - places where swapping out batteries is costly or impractical. It's a quiet, sustainable energy source that requires nothing but the living earth itself.

Using the pattern-recognition power of artificial intelligence, scientists have uncovered a troubling trend: floating algae are expanding dramatically across the world's oceans. AI allowed researchers to analyze satellite imagery at a scale impossible for human teams alone, revealing the true scope of algal growth that had previously gone untracked.

Algal blooms can disrupt marine ecosystems, deplete oxygen levels, and harm fisheries and coastal communities. The AI-powered scale of this survey gives scientists an unprecedented baseline to track future changes - and an urgent warning about the state of ocean health as warming seas create ever more favorable conditions for algae to thrive.

From black holes rewriting galactic history to dirt quietly generating electricity underfoot - today's science reminds us that extraordinary discoveries are hiding everywhere, from the cosmic to the microscopic. Stay curious. We'll be back with more tomorrow.