It isn't only physicists who are fascinated by light. Poets too have been entranced by its powers. Photons have mysterious properties. Perhaps this is why we like to light candles when we're feeling contemplative.
Blanketing the Antarctic ice sheet in artificial snow might sound outlandish. But could geoengineering help to counteract runaway climate change? One thing is clear: many of the ideas could be very risky.
Africa’s first climate monitoring station is located on Mount Mugogo in Rwanda. Scientists there monitor levels of various greenhouse gases. They hope their data will help strengthen Africa’s position at international climate negotiations.
In the Gorongosa National Park, young female scientists are cataloguing flora and fauna for a global genetic database. It will enhance our understanding of the diversity of life on earth and the roles different species play.
Whether hard drives or electric motors, rare earth elements play a key role in a range of technologies. The metals mostly come from China. To ease dependence, researchers at the RWTH Aachen University are working on recycling the precious elements.
Travelling up and down the river, Alexander von Humboldt was ravished by the beauty and variety of the landscapes, flora and fauna. Today nature conservationists are battling to preserve the region's many threatened species.
The Humboldt Current along the coast of Peru is bursting with life. With its nutrient-rich water from the depths, the ocean current discovered by Humboldt is vital for a huge ecosystem. But climate change is now disrupting it.