Millions of acres of fertile farmland in the developing world are being sold or leased to outside powers, raising the spectre of a new era of agricultural colonialism
On the African savanna, one woman goes eyeball-to-eyeball with a curious bull elephant and wonders at the earth's endless varieties of self-expression.
Climate change holds the potential to profoundly affect epidemiologic patterns, and vector biologist Andrew Githeko says malaria is particularly sensitive to this upheaval.