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After Stanford scientist Lee Herzenberg gave birth to a son with Down syndrome, she and her husband worked to find a noninvasive test that would help mothers learn about the health of the fetus.

Nobody knew how people in Southern California were getting infected with the life-threatening fungus C. gattii. A 13-year-old helped figure out the source: three types of trees.

After a climate change disaster, a train must circle the globe for its passengers to stay alive. The science fiction fable was inspired by a French graphic novel and directed by a South Korean auteur.

These middle schoolers have been working after school for six months building their giant human-powered brain sculpture. Will their ideas hold up or come crashing down?

These middle schoolers have been working after school for six months building their giant human-powered brain sculpture. Will their ideas hold up or come crashing down?

Perry says she won't be appearing on the show that bears her name this weekend, complaining of a loss of editorial control and pre-emption for election coverage. Media reports say Perry won't be back.

Orbital's Cygnus cargo spacecraft was carrying 5,000 pounds of supplies and experiments to the International Space Station.

They have provided physical evidence to a famous story of heroism during the Holocaust — known before only through the testimony of the 11 Jews who escaped a Lithuanian massacre site.

The Beijing-selected Panchen Lama is conducting a key Tibetan Buddhist ritual. It's the first time in 50 years the rite has taken place in Tibet. Critics say that's because China wants more control.

The fourth and final nuclear security summit is underway in Washington this week. But Vladimir Putin isn't there. And North Korea has thumbed its nose at the gathering by firing a cruise missile.