Sulli wasn't afraid to defend herself against online bullies, or advocate for women's rights in South Korea — a relative rarity. Now, after her death, the country is looking inward.

As more people identify themselves as neither categorically male nor female, some employers are making changes to neutralize references to gender in everything from name tags to bathrooms.

Companies are trying to figure out the risks to their profits from a warming planet. Some of them are turning to high-tech tools of climate science.

Alex Yiu was born a seemingly healthy baby. But by age 2, his muscle control and speech were deteriorating. His baffling condition took a decade to diagnose. The reanalysis of a DNA test was the key.