LifeLife may have emerged not once, but many times on Earth Far from being a miracle that happened just once in 4 billion years, life's beginnings could have been so commonplace that it began many times over Features
LifeTransgender Olympians in Rio don't have an unfair advantage The evidence shows that transgender women won’t outcompete other female athletes, says Yannis Pitsiladis, a member of the IOC’s scientific commission Comment