Following best practices from previous federal post-wildfire soil-testing efforts, The Times collected samples from ...

The federal government decided not to test the soil of L.A.'s burn areas for hazardous substances. A Times investigation ...

The eighth batch of scientific samples from China's Tiangong space station, weighing 37.25 kilograms, returned to Earth ...

Researchers with the University of Pittsburgh were in East Palestine Saturday, meeting with residents about an environmental ...