Copper IUDs (intrauterine devices) are a safe and effective type of birth control. It works by preventing sperm from fertilizing any eggs. Learn more about how to determine whether it’s right ...

Copper-based catalysts have shown potential for this transformation, but so far, they've struggled with low selectivity—which means that they produce a mixture of products rather than the ...

KoBold Metals closed a $537 million Series C round on Wednesday to help build a multi-billion-dollar mine to exploit a copper deposit it found using AI. The new funding round, which was led by ...