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Phys.org / Reanalysis suggests 'Phoebe' is a variable star, not a primordial black hole

A new study debunks a recent claim that astronomers may have detected a lunar-mass primordial black hole. In a reanalysis of observations from the Dark Energy Camera (DECam), researchers found that the star nicknamed "Phoebe" ...

Jun 28, 2026
Phys.org / What science tells us about the algae bloom in the Lincoln Memorial Reflecting Pool

Algal blooms in the Lincoln Memorial Reflecting Pool in Washington, D.C., have long been a visible public nuisance. When the pool turned green again on June 15, less than two weeks after President Donald Trump's US$14 million ...

Jun 29, 2026
Tech Xplore / Inside Houston's real-time strategy for managing World Cup traffic

Houston has already felt the first wave of World Cup traffic. Now, with a high-stakes July 4 match approaching, officials are prepared to keep the city moving, using real-time data, adaptive signals and other tools developed ...

23 hours ago
Phys.org / TESS just found a planet in a new way—and more may be hiding in its eight years of data

For the first time, NASA's TESS (Transiting Exoplanet Survey Satellite) mission has identified a planet orbiting a distant star thanks to its warping of space-time. Unlike the star-hugging transiting planets TESS regularly ...

Jul 1, 2026
Phys.org / Solar storms leave their mark on cosmic rays that reach Earth

A new study has revealed an unexpected link between solar storms and the flux of high-energy cosmic rays arriving at Earth. The findings, made using one of the world's largest cosmic ray detectors, could open up a new way ...

Jun 29, 2026
Phys.org / The universe is less uniform than we thought—cosmology may need a radical rethink

Modern cosmology rests on a simple assumption: If we look on large enough scales, matter should be distributed evenly, with no preferred direction within the cosmos. This is known as the cosmological principle.

Jul 1, 2026
Phys.org / DNA-based nanoswitch can flip in milliseconds and stay in one state for days without continuous forcing

Scientists have engineered a nanoscale switch using DNA "origami." Inspired by macroscale mechanical switches, the device achieves long-term functionality without the continuous forcing mechanism that past versions required ...

Jul 1, 2026
Phys.org / Europe's deadly heat wave scorches east, Slovakia hits record

Europe's most severe heat wave on record set new temperature records in eastern parts of the continent on Monday and forced Ukraine to order power cuts to cope.

Jun 29, 2026
Phys.org / 400-year-old painting reveals a bat's secret diet

Natural historians have many observational techniques in their toolkit for learning about the natural world: tagging animals with tracking devices, recording sounds, analyzing droppings or simply watching and counting. As ...

Jul 1, 2026
Phys.org / How a giant planet survived its star's death, then migrated inward

When astronomers discovered a giant planet orbiting a dead star in 2020, they wondered how it survived its star's violent demise. Now, observations from NASA's James Webb Space Telescope (JWST) may finally explain the planet's ...

Jul 1, 2026
Phys.org / Algae may have launched coral reefs by hijacking coral cells, genetic experiments suggest

The reefs scattered throughout the tropics arose only after algae took up full-time residence in coral cells, supplying corals with abundant food and enabling them to build extensive shallow-water communities. But with warming ...

Jul 1, 2026
Medical Xpress / BCG vaccine may rewire brain immunity, shift Alzheimer's markers over 12 months

New research led by Mass General Brigham investigators suggests that the Bacillus Calmette-Guérin (BCG) vaccine—which is delivered through the skin to prevent tuberculosis—may remodel the human brain's immune environment, ...

Jul 2, 2026