Rush hour on the Hollywood Freeway, Los Angeles, September 9, 2016.
AP Photo/Richard Vogel
Air pollution could be the next battleground between California and the Trump administration, which is reviewing the Golden State's special legal authority to regulate tailpipe emissions.
A diagram of where police shooting victim Stephon Clark was struck by bullets.
AP Photo/Rich Pedroncelli
Research on implicit bias, machismo and community relations may shed light on what drives police-citizen violence.
Postcard of the Napa State Hospital in Napa, Calif., circa 1905. Over 1,900 Californians were recommended for sterilization while patients here.
The collection of Alex Wellerstein
About 20,000 Californians were once sterilized under state eugenics laws. New research shows Latinos were disproportionately targeted. Is there any opportunity today to address these wrongs?
President Donald Trump reviews border wall prototypes in San Diego.
AP Photo/Evan Vucci
A legal scholar explains how even in the early days of the republic, Americans struggled to agree on who had the final say on immigration issues.
A San Diego rally against a scheduled visit by President Donald Trump.
AP Photo/Gregory Bull
Defiant against Trump's policies on immigration and environment, California finds itself defending its way of life – the California Dream itself.
George Brich/AP Photo
Only recently did it come to represent the dream of fame.
The polyphagous shothole borer is tiny - but a fungus it’s commonly associated with can be deadly for trees.
Wilhelm de Beer
The beetle and the fungus have devastated trees in California in the US as well as in Israel. Now they're in South Africa.
California’s 1994 fight over immigration parallels the present-day U.S.
AP Photo/Nick Ut
In the 1990s, older Californians struggled to make way for a younger, more diverse generation. Here’s how that 'racial generation gap’ transformed the state – and what it means for the rest of the US.
The new plan is supposed to boost the construction of new roads, bridges and other public works projects.
AP Photo/Seth Perlman
The long-awaited $1.5 trillion plan fails to address some major obstacles to private investment.
The European Investment Bank's funding of the Trans Adriatic Pipeline will harm the climate and makes little financial sense.
The White House favors public-private partnerships for widening congested roads and getting other pricey projects done.
AP Photo/Charles Dharapak
The $1.5 trillion plan he's proposing would do the most for ventures that don't really need the government's help and ignores some major obstacles to private investment.
Sunset on the beach, Santa Barbara, California.
Fifty years after a major oil spill in Santa Barbara helped launch the environmental movement, Californians strongly oppose the Trump administration's push to expand offshore drilling.
Customers lining up to legally buy recreational marijuana in West Hollywood, Calif.
AP Photo/Richard Vogel
The attorney general's memo portended an end to a hands-off approach to this enforcement conundrum. It could backfire.
Fires break out across San Francisco after the April 18, 1906 earthquake.
According to current forecasts, California has a 93 percent chance of an earthquake with magnitude 7 or greater occurring by 2045. Early warning systems, now in development, could limit casualties and damage.
Suspected infestation of Macrophomina phaseolina, a “novel” soil pathogen, in the non-fumigated buffer zone of a strawberry field.
California produces 90 percent of the US strawberry crop, but growers face curbs on toxic chemicals that have helped their industry expand. Can a system centered on mass production become more sustainable?
As many as 20 people are dead and dozens missing following the Southern California mudslides.
AP Photo/Marcio Jose Sanchez
A watershed scientist explains why post-wildfire landscapes are so susceptible to landslides – and why those risks are poised to rise.
New York Gov. Andrew Cuomo vows he will fight to protect his state from fallout from the new tax law.
AP Photo/Hans Pennink
New York, California and other high-tax states are angling to use the charitable deduction and state payroll taxes as workarounds to shield both their residents and their revenue.
Protesters outside the Supreme Court await a court decision in June 2016.
Under a California law, faith-based crisis pregnancy centers must post signs with information about family planning services. The centers say it violates their First Amendment rights.
This fire season has been particularly damaging to urban areas.
AP Photo/Reed Saxon
With wildfires continuing to rage across southern California, a fire researcher says lowering fire risk means reconsidering where and how we build our communities.
Humboldt Fog chèvre, born in a dream.
California's artisan cheese-making industry has followed the changing tastes of the state's population waves, from the mid-1800s through today.