National Geographic's Photo of the Day—captured by Simon Kwan—shows Hong Kong in all its glorious urban madness. When I first saw it I thought it was a collage made with multiple shots and mirrored images. It's not. It's just the city photographed from Beacon Hill.
As climate change begins posing new challenges to conventional outdoor food production methods, hydroponic farming has made quick gains in popularity. This enormous indoor lettuce farm for example, produces 10,000 heads a day.