A shrinking body and a quiet underarm lump masked a dangerous truth, highlighting how easily breast cancer can hide in plain ...

Whether you call it radiation fog, ground fog, valley fog or a temperature inversion, it all comes down to the same physics: the atmosphere flipping upside down. CBC’s Johanna Wagstaffe breaks down ...

While it has become a word, laser used to be an acronym: “light amplification by stimulated emission of radiation”. But there is an even older technology called a maser, which is the ...

Dr. Athiray Panchapakesan at UAH leads a $1.27M NASA-backed mission to study solar flares' impact on Earth, aiming to improve ...

Dense tule fog has gripped the Central Valley, cutting visibility on I‑5, 80 and 99. Where it's worst, driving safety tips, ...

Drivers around Sacramento and the Central Valley have been unable to escape a particular weather phenomenon for the past couple weeks. Blankets of dense grey fog have hung around the region bringing ...

Large plumes of polluted air have spread out across several states on the East and West Coasts Wednesday, triggering alerts to stay indoors and avoid strenuous activity.

Earth's magnetic field is generated by the churn of its liquid nickel-iron outer core, but it is not a constant feature.

In a move set to rekindle one of modern technology’s most persistent debates, the U.S. Department of Health and Human Services (HHS) — under Secretary Robert F. Kennedy Jr. — has quietly shifted its ...

Powerful solar activity released by the sun reached Earth Monday, causing colorful auroral displays and GPS issues for aircraft, according to the National Weather Service’s Space Weather Prediction ...

Add Yahoo as a preferred source to see more of our stories on Google. The northern lights are pictured over Portsall in western France on January 19. - Oscar Chuberre/AFP/Getty Images Powerful solar ...