More than 50 countries will send expeditions to (and focus their satellites on) Earth´s remotest regions during the fourth International Polar Year, which begins in March. By coordinating observations and analysis, scientists will gather extensive data that could lead to a new understanding of melting ice caps, the depleted ozone layer and thinning permafrost. They will also conduct some of the most detailed surveys of marine ecosystems and polar wildlife ever undertaken.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.