Until the recent observation of merging neutron stars, how the heaviest elements come to be was a mystery. But their fingerprints are all over this cosmic collision.
Ordinary grey bird feathers placed under X-ray fluorescence reveal beautiful patterns of elements like zinc, telling a story of feather growth and the environments the birds have experienced.
Glencore has admitted responsibility for air pollution in Mount Isa, but its latest report puts the onus on residents to minimise their exposure to lead contamination in their homes.
Food-borne diseases will continue to thrive unless Africa's meat inspection programmes are upgraded.
A wake-up call from Flint: the U.S. has made great gains in reducing lead exposure, but the country is still saddled with millions of miles of water-carrying lead pipes.
Newly released data show how the hundreds of abandoned mines in the western US discharge the same volume as the Gold King Mine spill every two days.