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Scientists say they've found evidence of a very long gravitational wave that could open a window onto supermassive black holes — and perhaps even other extreme, unseen objects in the universe.

New research calls into question prescribing the drugs even for short-term pain relief – especially given the risk of addiction.

Dynamic pricing of groceries, or reducing prices as perishable items approach their expiration date, could reduce food waste from grocery retailers by 21% or more, a study from UC San Diego's Rady School of Management released Tuesday found.

Premieres Wednesdays, Oct. 4 – Nov. 1, 2023 at 9 p.m. on KPBS TV / PBS App. THIS WEEK: The story of Earth can only be told because now, 4.5 billion years into its existence, a technological and self-aware animal species roams its surface, able to study the very planet that gave rise to it. But how exactly did Earth give rise to humans? Through stunningly realistic animation, witness the cataclysmic asteroid strike that wiped out the dinosaurs, the tumultuous changing climates that allowed early primates to spread across the planet, and the geologic events that created the conditions for the evolution of an animal that walks upright on two legs.

The Earth's lunar sidekick will appear extra big and bright as it reaches its fullest stage on Wednesday. It's not just the biggest supermoon this year, it's also a rare blue supermoon.

Lower-income countries did not get the COVID vaccines they needed. So the World Bank and other partners tapped a South African company to cook up the (undisclosed) recipe for the Moderna mRNA vaccine.

San Diego Mayor Todd Gloria joined KPBS Midday Edition Tuesday to talk about why he felt it was important to delay a city council vote on the proposed Ash Street settlement. Then, SANDAG’s long standing train track relocation plan for a 1.7 mile stretch of the Del Mar bluffs has gotten its initial funding from the state of California. Plus, a look at how a Vons closing its doors in Vista could make access fresh and healthy food more difficult. Plus, does San Diego Gas and Electric really need to keep boosting our utility rates? The state auditor is looking into it. Also, The director of the National Science Foundation, Sethuraman Panchanathan, paid a visit to San Diego last week to dedicate an upgraded earthquake shake table at UC San Diego. Finally, a horrific case of a woman enslaved by a Coronado couple unfolded in a San Diego federal court 75 years ago this summer. The case is remembered as a watershed moment for some of the Civil Rights protections we have today.

Here are a few places to visit in San Diego with your kids during spring break.

A Black driver is more likely to face being searched, handcuffed, or arrested when a police officer's first words are commands rather than a greeting or an explanation.

Many people who tried to access content on the platform were met with error messages. Twitter CEO Elon Musk said "extreme levels of data scraping" were affecting user experience on the site.