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San Diego is hosting the third annual California STEM Learning Network Summit for science, technology, engineering and math educators from across California.

The tobacco giant is supporting its first cigarette tax — 60 cents more per pack. But some health groups oppose Missouri's ballot measure, as do some education groups that would benefit from the tax.

Airs Tuesdays, September 22 - October 6, 2015 from 8 p.m. - 10 p.m. on KPBS TV

The dairy industry runs 24/7, but federal law excludes its workers from overtime pay. A new class-action lawsuit in Washington state is the latest challenge to that law.

Spain's ruling conservatives won the most votes in Sunday's elections but fell far short of a majority. Whether Prime Minister Mariano Rajoy will be able to remain in office is unclear.

The report says there are few incidents of tainted water given the number of wells. Energy companies agree. Environmentalists accuse the industry of undue influence over the study.

National Intelligence Director James Clapper says there are multiple obstacles in calculating just how many U.S. citizens are ensnared in government data-collection programs targeting foreigners.

Earth's changing climate has made the quest to understand wave behavior more important than ever, scientists say. Rising seas, storm surge and dune and reef erosion all shape Florida's Gulf Coast.

Researchers analyzed people's photo galleries on Instagram, then asked about their mental health. People who favored darker, grayer photos and filters were more likely to be depressed.

As he prepares for a conference on implementing clean energy to combat climate change, energy secretary Ernest Moniz says he's confident the Obama administration's commitments will remain in place.