The tiny organisms that cause harmful blooms of algae can have a big impact on your trip to the shore. A toxicologist explains what causes these events and how to keep people and pets safe.

Avian influenza viruses have evolved to infect birds, but the current H5N1 outbreak is also infecting a wide range of mammals. This suggests that it could mutate into forms that threaten humans.

The Biden administration is finalizing the first federal limits on two compounds, PFOA and PFOS, in drinking water. These so-called ‘forever chemicals’ have been linked to numerous health effects.

Harvard experts on law and policy say originalist view used to overturn Roe could upend the 1976 Supreme Court ruling that requires a minimal standard for inmate health care.

An environmental health lawyer explains why some states have weaker rules than others, and how you can make your concerns heard.

Transportation Secretary Pete Buttigieg is looking into new rules for trains. Trucks, however, are involved in thousands more hazmat incidents every year in the US.

Middle age means staying a step ahead on both the medical and financial fronts.

Vital records document the birth, death, marriage and divorce of every individual. A more centralized system in the US could help public health researchers better study pandemics and disease.

Twitter has long allowed anyone to access its data about who tweeted what and when. This has been a boon to research, from public health to criminology. The new fees put that research at risk.