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Researchers have found that residue stuck on smokers' clothes, furniture or other surfaces can become airborne and pollute indoor air.

It's not easy for medical students to learn to diagnose an illness from a patient's often jumbled account of symptoms. In some med schools, teachers have discovered the perfect teaching aid: Car Talk.

The former captives, believed to be three Americans of Korean descent, are traveling with Secretary of State Mike Pompeo and will arrive back in the U.S. early Thursday.

Veerabhadran "Ram" Ramanathan, distinguished professor of atmospheric and climate sciences at Scripps Institution of Oceanography, talks about what the rollbacks mean for the fight against climate change.

The Trump administration added a question about U.S. citizenship status that could undermine the quality of 2020 census information. Dozens of states and cities are suing to get the question removed.

Scientists at the Salk Institute are turning to plants as a means to stave off climate change but are facing an ethical dilemma: should they use genetic engineering to make more resilient plants?

The well-liked Republican leading a deep-blue state is an outspoken critic of President Trump and has denounced the "debilitating politics of Washington."

A dozen days of films with an Italian perspective

In this episode of San Diego Politics 101, we look at ballot measures. Why do we see so many ballot measures and how can voters educate themselves about the issues they address?

A garden snail with a rare genetic condition can't mate with normal snails; scientists launch an international search for a mate; two possible mates are found. But they mate with each other instead.