Unsafe E. coli levels found in Paris’ Seine River less than 2 months before Olympics Contamination levels in the first eight days of June, after persistent heavy rain in Paris, showed bacteria such as E. coli and enterococci beyond limits judged safe for athletes. Read more on NPR

What the bump stock ban could mean for guns in the U.S. The U.S. Supreme Court overturned a federal ban on the devices, which could have wider implications for what qualifies as a machine gun. Read more on NPR

Some TikTok influencers are maligning sunscreen. Here’s what to know about the claims Sunscreen is the best way to protect ourselves against skin cancer. But doctors are concerned by a backlash against sunscreen that is spreading on social media. Recent surveys suggest many younger Americans are buying into this misinformation, at a time when skin…

A major disinformation research team’s future is uncertain after political attacks The Stanford Internet Observatory studied how social media platforms are abused. Now, its top leaders are out and future funding is uncertain amid attacks on its work by conservatives. Read more on NPR