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Caster Semenya. Photo: Cameron Spencer/Getty Images

Olympic champion Caster Semenya appealed to Switzerland’s Supreme Court Wednesday against the International Association of Athletics Federations' new rule requiring middle-distance female runners with high natural levels of testosterone to use medication to lower their levels.

Why it matters: Semenya was to compete at the world championships in Doha in the 800 meters event this September, but the rule would prevent her because of her testosterone level. "I am a woman and I am a world-class athlete," she said in a statement, per Reuters. "The IAAF will not drug me or stop me from being who I am."

Go deeper: Caster Semenya says "hell no" to testosterone-lowering drugs

Go deeper

Bryan Walsh, author of Future
28 mins ago - Health

Falling sperm counts could threaten the human race

Illustration: Sarah Grillo/Axios

A new book makes the case that sperm counts have been falling for decades — and a major reason is chemicals in the environment that disrupt the body's hormonal system.

Why it matters: The ability to reproduce is fundamental to the viable future of any living thing. If certain chemicals are damaging our fertility over the long term, human beings could end up as an endangered species.

2 hours ago - Health

Black churches become vaccine hubs

A woman arrives at a COVID-19 vaccination clinic outside the Pennsylvania Avenue Baptist Church in southeast D.C. Photo: Jacquelyn Martin/AP

Black pastors have a new job on their plates during COVID-19: encouraging skeptical congregants to get vaccinated.

Why it matters: “There’s distrust in our community. We can’t ignore that,” Rev. James Coleman of D.C.'s All Nations Baptist told AP.

Biden names USPS board of governors nominees, as Democrats put pressure on DeJoy

United States Postal Service Postmaster General Louis DeJoy at a Feb. 24 committee hearing. Photo: Graeme Jennings/pool/AFP via Getty Images

President Biden on Wednesday nominated a former postal union lawyer, a vote-by-mail advocate, and a former deputy postmaster general to sit on the Postal Services' Board of Governors.

Why it matters: The nominations, which require Senate confirmation, come as some Democrats call for Postmaster General Louis DeJoy's ouster and others push for Biden to nominate board members to name a new postmaster general.