EVERYONE'S TALKING

• Ellen's out. DuPont CEO Ellen Kullman is retiring after six years at the helm. Her departure is surprising because Kullman recently beat back a two-year challenge from activist investor Nelson Peltz, convincing shareholders to vote down Peltz's proxy fight to split up the company. DuPont board member Edward Breen will assume the CEO role on an interim basis. Fortune

ALSO IN THE HEADLINES

• Ladies of the livestream. Fortune's 2015 Most Powerful Women Summit starts next Monday. Attendance is by invitation only, but never fear: You can watch all the main-stage action on our livestream. Check out our rundown of star speakers including General Motors CEO Mary Barra, Fox News anchor Megyn Kelly, Ivanka Trump—and Warren Buffett.  Fortune

• Fed first. Fed chair Janet Yellen tops Bloomberg Markets' new ranking of the 50 Most Influential people. Other women on the list: Fidelity Investments CEO Abigail Johnson and Banco Santander chairman Ana Botin. Bloomberg

• Robert responds. Sen. Elizabeth Warren (D-MA) raised questions about potential conflicts of interest in economist Robert Litan's research, prompting him to step down from his position as a senior fellow at the Brookings Institution. Now, Litan defends his paper—and speculates about why Warren has been so keenly interested in it. Fortune

• The Dems Senate savior? New Hampshire Gov. Maggie Hassan will challenge GOP Sen. Kelly Ayotte next year—a move that boosts Democratic chances of regaining Senate control. Politico

• Women's fashion—without women. Of the 91 shows on Paris Fashion Week's official schedule, fewer than 20% represent brands with female creative directors. New York Times

• Hanging tough. Gert Boyle, the 91-year-old chairman of Columbia Sportswear, is returning to the company's commercials, a decade after her initial run of wacky TV ads starring "tough mother" Boyle and her son—and current Columbia CEO—Tim.  Ad Week

MOVERS AND SHAKERS: Terri Spath has joined Sierra Investment Management as chief investment officer. Spath was most recently with Mercer Advisors.

IN CASE YOU MISSED IT

• Defender of the universe. Catharine A. Conley is the planetary protection officer at NASA. While that title may conjure visions of alien invasion movies, Conley’s job is not so much protecting Earth as it is protecting other planets from Earth. New York Times

• A foundation flip-flop. While Carly Fiorina wants to defund Planned Parenthood, it seems that her charity organization, the Fiorina Foundation, is run by a group that distributes funds to PP—nearly half a million dollars since 2011. The Daily Beast

• Running things. Once a Maoist child soldier, 25-year-old Mira Rai is now a world-class long-distance mountain racer—one of the world’s toughest sports—and an inspiration to Nepalese women, who often lack educational opportunities in the ultra-conservative country.  The Guardian

• A dangerous device? Reporta, a new app from the International Women's Media Foundation, is supposed to give journalists working in dangerous environments a way to check in with editors and other trusted sources. However, some security experts say the app is flawed and may actually be putting journalists in danger. Vice

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ON MY RADAR

Madeeha al-Musawi, an Iraqi heroine  The New Yorker

One gender is more likely to suffer from insomnia because of genetics  Quartz

Being a woman in STEM is stressful  Time

Indian Wells exec Steve Simon named new WTA chief  SI

QUOTE

I knew I could cook as hard and as fast as guys—and it was an added pressure to show that I could do that for all women in the industry.

Cat Cora, on what it was like to be selected as the first female Iron Chef