China's pollution woes are a problem with global ramifications. Follow the team of green engineers trying to build an energy-efficient Beijing.
Enter the real-life world of Grand Theft Auto: the thieves, chop-shops and cops, all part of a global trillion-dollar industry.
Dust storms are common to both Earth and Mars. For hundreds of years scientists have found dust – possibly from Africa – in unusual places.
Can a boat made from recycled bottles float? Can one of the world's tallest buildings also be green? In Taiwan, two teams race to find out.
The team build a 15-foot high wasps' nest in the middle of New York, complete with human-scale cells and 'larvae' (actually white balloons).
While walking through Central Park, Labrador Milo ingests a piece of needle-laced cow tongue. Loki the Jack Russell Terrier eats fish bait.
Victoria Falls, Zambia: A baboon rests on the back tyre of a jeep. This image is from Urban Jungle.NGT/Kelly Sweet
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