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Researchers who study developing human embryos have long limited their experimentation to lab embryos that are no more than 14 days into development. Some scientists are now pushing that boundary.

Researchers who study developing human embryos have long limited their experimentation to lab embryos that are no more than 14 days into development. Some scientists are now pushing that boundary.

About half of Americans own stock, though most stocks are owned by the wealthiest. For many, a booming stock market does not offer direct benefits.

Donald Trump addressed a crowd of thousands at the American Airlines Center in Dallas Monday. He spoke mostly about himself but also addressed illegal immigration, which drew a thunderous reaction.

Airs Tuesday, March 20, 2018 at 11 p.m. on KPBS TV

An overview of multiple legal challenges and protests since the U.S. Army Corps of Engineers considered approving a section of the pipeline near the Standing Rock Sioux Reservation in North Dakota.

There's no evidence that screening adolescents with electrocardiograms prevents deaths, yet the heart tests have become widespread despite the false alarms they often cause.

After Texas officials moved to block the health provider from receiving Medicaid dollars, a federal judge issued a preliminary injunction against the state, allowing the group to stay in the program.

There's no evidence that screening adolescents with electrocardiograms prevents deaths, yet the heart tests have become widespread despite the false alarms they often cause.

Rising floodwaters sent at least 14,000 residents fleeing inundated homes in San Jose, California, and forced the shutdown of a major freeway Wednesday.