Doping experts have yet to find an effective test to uncover athletes using the gases xenon and argon to boost performance, as a ban is introduced.

New research estimates greenhouse gases from food production will go up 80% if meat and dairy consumption continues to rise at its current rate.

Melting ice is fuelling sea-level rise around the coast of Antarctica, a new report finds.

African ministers and business leaders gather in Ethiopia to consider ways to trigger a green revolution and improve the continent's food security.

An engraving found at a cave in Gibraltar may be the most compelling evidence yet for Neanderthal art.