Welcome to Science News Daily, your source for the latest breakthroughs and discoveries shaping our understanding of the universe. I'm your host, and today we're diving into some truly fascinating stories from the frontiers of science.

Let's start with one of the biggest mysteries in the cosmos: dark matter. We know dark matter makes up about 85 percent of all matter in the universe, yet it remains invisible and undetectable through normal means. Now, researchers from the University of Geneva have been investigating whether dark matter follows the same physical laws as ordinary matter, or if it might be controlled by some unknown fifth force. Their findings suggest that dark matter does indeed obey classical physics, though some questions remain. But here's where it gets even more intriguing: separate research suggests that distortions in the Milky Way's dark matter core, caused by past galactic collisions, might explain the mysterious gamma-ray glow at our galaxy's center. For years, scientists thought this glow came from pulsars, but dark matter is back as a prime suspect in one of astronomy's biggest puzzles.

Staying in space, black holes are revealing secrets that could challenge Einstein's theory of relativity. Thanks to the Event Horizon Telescope's groundbreaking images, scientists can now compare the shadows cast by black holes with theoretical predictions. By studying these shadows under extreme conditions, researchers are testing whether general relativity truly holds up, or if we need to refine our understanding of gravity itself. These observations are pushing physics to its absolute limits.

And speaking of exciting space news, astronomers have discovered a potential super-Earth less than 20 light-years away that has scientists buzzing about the search for alien life. This giant exoplanet orbits a nearby dwarf star in an ideal location for next-generation telescopes to study. Its proximity and positioning make it an excellent candidate for detecting potential biosignatures, giving us fresh optimism in answering that age-old question: are we alone in the universe?

Shifting back to Earth, let's talk about some surprising health discoveries. Researchers have found that a common antibiotic, doxycycline, might help prevent schizophrenia in young people. Adolescents treated with this drug were significantly less likely to develop the condition later in life. The protective effect likely comes from the antibiotic's anti-inflammatory and brain-modulating properties, opening up intriguing new avenues for mental health prevention.

Here's something that might make you reconsider your dental care routine: scientists have developed a toothpaste made from human hair that could actually help regrow tooth enamel. The key ingredient is keratin, a natural protein found in hair. This innovative approach offers both an environmentally friendly and clinically effective method for protecting and repairing damaged teeth. And in another surprising medical discovery, researchers have found that mutations in a gene called CPD cause certain types of congenital hearing loss. Even more exciting, experiments suggest that common medications like sildenafil, better known as Viagra, might help restore hearing function by repairing disrupted cellular pathways.

Now for some concerning environmental news. Cockroach infestations don't just bring unwanted guests; they fill homes with allergens and bacterial toxins that can trigger asthma and allergies. North Carolina State researchers found that larger infestations produce higher toxin levels, especially from female roaches. The good news? When exterminators eliminate the pests, both allergens and toxins plummet dramatically, highlighting how crucial pest control is for indoor air quality.

In other environmental discoveries, scientists have identified a major, previously unaccounted-for source of greenhouse gas emissions: abandoned mines. Uncontrolled runoff from these sites may be releasing significant amounts of carbon dioxide from bedrock into the atmosphere, adding a new dimension to our understanding of climate change sources.

Let's dive into some physics breakthroughs. A team at the University of Warwick has solved a century-old puzzle about how irregularly shaped nanoparticles move through the air. This breakthrough helps us better track harmful airborne pollutants like soot, dust, and microplastics that we inhale daily. Meanwhile, other physicists discovered that electrons need specific doorway states to escape from solids, not just energy. This finding explains long-standing experimental anomalies and could revolutionize how we engineer layered materials.

The quantum world continues to amaze us. Google's quantum computer has revealed a previously unobserved exotic phase of matter, highlighting how quantum computing can advance fundamental physics. And scientists have designed a topological quantum battery that charges efficiently without losing energy. Surprisingly, dissipation, long considered harmful, might actually boost power in these next-generation batteries.

In materials science, diamond has been dethroned. Researchers at the University of Houston discovered that boron arsenide crystals can conduct heat even better than diamond when properly refined, upending long-held assumptions about thermal conductivity.

Here are some rapid-fire discoveries: E. coli bacteria can spread between people as fast as swine flu, according to new genomic modeling. Exercise doesn't just strengthen muscles; it trains the immune system, making older adults' immune cells more effective at fighting inflammation. Both smoking and vaping significantly increase diabetes risk. And beneath the ocean's surface, bacteria have evolved specialized enzymes that can digest PET plastic, found in bottles and clothing. These enzymes appear in nearly 80 percent of ocean samples, showing nature's remarkable adaptation to human pollution.

Finally, some fascinating findings from archaeology and ecology. When Surtsey, Iceland's youngest island, erupted from the sea in 1963, it became a natural laboratory. Scientists discovered that plants colonizing this young island weren't carried by wind or water, but by birds serving as winged gardeners. And in Kenya, researchers uncovered 2.7-million-year-old stone tools showing that early humans maintained consistent toolmaking traditions for nearly 300,000 years despite extreme climate changes. These tools helped our ancestors adapt and survive, anchoring human evolution.

That's all for today's Science News Daily. From the depths of space to the microscopic world, science continues to surprise and inspire us. Join us tomorrow for more incredible discoveries. Until then, stay curious.