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Caster Semenya of South Africa races to the line to win the Women's 800 meters during the IAAF Diamond League event at the Khalifa International Stadium on May 03, 2019 in Doha, Qatar. Semenya has appealed a ruling that requires her to reduce her testosterone levels by drugs or surgery.

I Am A Woman": Track Star Caster Semenya Continues Her Fight to Compete As A Female

Male and female athletes compete in separate categories because of advantages that come with testosterone. But what should be the rules for women who have naturally high testosterone levels?

The Department of Health and Human Services says its decision to place new restrictions on the use of human fetal tissue in medical research follows a review that began last September of HHS research involving such tissue.

Trump Administration Restricts Federal Research Involving Human Fetal Tissue

National Institutes of Health research "that requires new acquisition of fetal tissue from elective abortions will not be conducted," the Department of Health and Human Services says.

Brett Gray (left) as Jamal Turner, and Peggy Blow as Abuela, a lovable, pot-smoking grandma, in the first season of the Netflix teen drama On My Block.

Netflix Curbs Tobacco Use Onscreen, But Not Pot. What's Up With That?

TV networks have standards that minimize tobacco use on shows, and Netflix now does, too. But streaming companies lack public policies about smoking cannabis onscreen, and doctors say that hurts kids.

Kelly Craft, who has been serving as U.S. ambassador to Canada, is President Trump's latest pick for U.N. ambassador.

Trump Nominates Kelly Craft, Ambassador To Canada, For U.N. Post

Craft's nomination as ambassador to the United Nations follows State Department spokeswoman Heather Nauert's withdrawal from consideration.

A child is immunized against measles, mumps and rubella in Lyon, France.

Why The Measles Surge Could Open The Door To A Host Of Other Diseases

There's mounting evidence that the measles virus can erase our immunity to everything from influenza viruses to diarrheal disease.

'Reluctant Psychonaut' Michael Pollan Embraces The 'New Science' Of Psychedelics

Author Michael Pollan, who experimented with mushrooms, LSD and other psychedelics while researching his latest book, says: "I had an experience that was by turns frightening and ecstatic and weird."

The now-defunct San Onofre Nuclear Power Station is pictured May 30, 2019.

Nuclear Fuel Transfers At San Onofre Are Now Safe, Federal Regulators Say

Southern California Edison was given the go-ahead by the Nuclear Regulatory Commission to resume fuel transfers two weeks ago.

The main cast of AMERICA'S TEST KITCHEN. In Season 18, hosts Bridget Lancaster (third from left) and Julia Collin Davison (second from right) head into the test kitchen to bring viewers equipment reviews, taste tests, and recipes for the home cook.

AMERICA'S TEST KITCHEN FROM COOK'S ILLUSTRATED: Season 18

Airs Saturdays, April 14-May 26 & June 23-Aug. 11 & Sept. 1-22 & Oct. 6 & Oct. 20-Nov. 17, 2018 at 2 p.m. on KPBS TV

Placenta purveyors often dehydrate and grind a new mother's placenta to a powder, then add it to a pill capsule. Generally, the goal is to increase her milk production, energy and mood, but scientists dispute such benefits.

Opinion: Placenta-Eating Went Mainstream When Many Doctors Stopped Listening

Preparers of pills made from placental tissue have gained online momentum, claiming to support each new mom in her slog to recovery. A historian traces the trend to a mother's need to be heard.

Saint Augustine was among the saints who pushed some of the bans and policies that may have paved the way for a breakdown of extended family networks in Western Europe during the Middle Ages.

Western Individualism May Have Roots In The Medieval Church's Obsession With Incest

Researchers combed Vatican archives to find records of how ancient church policies shaped Western values and family structures today.

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