Can California's wet weather make earthquakes more likely? Scientists are still learning about what triggers these events. Even human activity can be a culprit.
A new federalism? Trump's decision to green-light the Dakota Access Pipeline and early battles with states show a disregard for the sovereignty of domestic government bodies.
California has set ambitious goals for cutting carbon emissions and shifting to a clean energy economy. How will this strategy affect the state's huge economy? An economist weighs the evidence.
At many Spanish missions in the US and Latin America, the rising sun illuminates the altar on the winter solstice or other symbolic days. To the faithful, these events meant that Christ was with them.
What if you could go into a voting booth and rank your first, second and third choices? It could happen in Maine, if voters approve.
We can't keep blaming the MMR-autism scare – there are other forces at play.
Like George Washington, Colin Kaepernick is willing to sacrifice for America.
No federal database provides reliable info on deaths that occur in police custody. It’s the same situation in 48 states. But now California and Texas are offering new models of accountability.
Can nuclear power plants like California Diablo Canyon be replaced without greatly raising emissions? It's an open question.
Nearly 650,000 new voters have registered to vote in the California primary. What the influx of new voters will mean is anyone's guess.
From floods to drought, fire to famine, the 2015-16 El Nino has had a global impact.
Expect $33 billion of damage ... and that's just for starters.
John Muir, born 178 years ago today, was one of America's first great conservation advocates. His letters and diaries convey the emotions Muir felt in Yosemite Valley, his 'sanctum sanctorum.'
Where and how you have the right to legally end your life.
In the 1970s, California Governor Jerry Brown helped pioneer mandatory sentencing. Now he's working to overturn the practice.
Field research in Oakland highlights a major issue that Americans have yet to face up to: how to deal with growing numbers of homeless older people in our streets.
The flood-control infrastructure built to weather heavy rains in Los Angeles sends runoff to sea – a poor design for drought-worried California.
The University of California intends to be carbon-neutral by 2025 by implementing existing technologies and focusing on public education. Is this a model for decarbonizing at large scale?
Study shows that many of the utility-scale solar power plants in California have been placed near protected and environmentally sensitive lands.
Campaigners against commercial kangaroo harvesting say it's unsustainable and have convinced California to extend a ban on kangaroo imports. But are Australia's world-famous roos really at risk?