By 1993 it was discovered that arsenic was present in these wells ... That was Peter Wothers who will be here to tell the tale of the smelly element tellurium on next week's Chemistry in its element.

Arsenic is a trace element that lies just below phosphorus – which is essential for all living ... enables measurements that are largely unaffected by local sources of pollution. On the Pic du Midi, ...

Arsenic is a trace element that lies just below phosphorus ... On the Pic du Midi, the researchers discovered, among other things, that clouds contain significantly more arsenic on average ...