The glow in the dark forest was hands-down the best bit of the otherwise awful film Avatar. Leaving the cinema, my first thought (after that's three hours of my life I will never get back) was to wish very hard that there was a bioluminescent forest somewhere in the world. And just like The Secret promised, thanks to the power of positive thinking, it's happened. Last month, Taiwanese scientists discovered that gold nanoparticles (pictured below) could make plants glow in the dark, transforming trees into streetlights and our lives into a way better version of Avatar. There are environmental benefits as well: using trees to replace street lights would save on electricity costs and could also reduce light pollution in major cities. Now I'm just going to keep my fingers crossed for a hoverboard from Back To The Future 2.