Fertilizing the ocean

Fertilizing the ocean

As Earth warms, should we try huge geoengineering projects to cool the climate? Would adding iron to fertilize ocean plants withdraw More »

Looking anew at diamonds

Looking anew at diamonds

New analysis uses light to distinguish one diamond from another, but won’t help the battle against the “conflict diamonds”. More »

Understanding Volcanoes

Understanding Volcanoes

How do volcanoes work, and how accurate are predictions? How have volcanoes changed the landscape? More »