Michel Martin

Before Bill Cosby was an inmate at a Pennsylvania state prison, he held a pristine reputation as one of Hollywood's most beloved entertainers.

So when Andrea Constand's sexual assault allegations against Cosby broke in 2005, Nicole Weisensee Egan, an investigative reporter at the Philadelphia Daily News at the time, was skeptical. She had grown up watching The Cosby Show, revering the show's family-friendly main character, Cliff Huxtable.

"I was like, 'Who is this woman?' Because they weren't releasing her name," Egan says.

Mavis Staples could've retired in good conscience years ago.

But slowing down isn't her style.

With her father, sisters and brother as The Staple Singers, her gospel songs scored the civil rights movement.

More than a half century later, as Staples nears 80, the decorated R&B star continues to train her soulful pipes on hope and resilience in her call for change.

Melinda Gates, the co-founder of the Bill & Melinda Gates Foundation, has written a new book, The Moment of Lift: How Empowering Women Changes The World.

Published this week, the book calls on readers to support women everywhere as a means to lift up society. She pulls from her lessons learned through the inspiring women she's met on her travels with the Gates Foundation, which funds projects to reduce poverty and improve global health in the developing world (and is a funder of NPR and this blog).

Updated at 10:23 p.m. ET

In 2014, Michael Brown, an 18-year old unarmed black man, was fatally shot by a white police officer in Ferguson, Mo.

In the four months that followed, the stock price of the stun-gun maker Taser International, now known as Axon Enterprise, nearly doubled.

Nina Martinez just became the world's first living HIV-positive organ donor.

In a medical breakthrough, surgeons at Johns Hopkins Hospital late last month successfully transplanted one of her kidneys to a recipient who is also HIV positive.

"I feel wonderful," Martinez, 35, said in an interview with NPR's Michel Martin, 11 days into her recovery. The patient who received her kidney has chosen to remain anonymous, but is doing well, Martinez is told.

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