Concrete’s carbon problem
The world’s most common building material has a huge carbon footprint. Angeli Mehta talks to the scientists trying to reduce it
Stem cell hype
Many clinics around the world offer unproven treatments, while genuine therapies are slowly making their way through trials. Anthony King reports
A persistent perfluorinated problem
PFASs were used in household and industrial products for decades before their harmful health effects and biopersistence came to light. Rebecca Trager investigates a messy situation
Hydrogen storage gets real
As production costs fall and demand is poised to rocket, James Mitchell Crow finds the hydrogen economy is finally ready for take-off – as long as we can find ways to store it
Chemical clocks for archaeological artefacts
Radiocarbon dating is a standard technique, but what if your artefacts are inorganic? Rachel Brazil finds out how to accurately age pottery and even metals
