The way the Land of the Rising Sun built and lost its dominance in photovoltaics shows just how vulnerable renewables remain to changing politics and national policies.
We need to come to grips with what autism really is.
For years scientists searched fruitlessly for the causes of autism by looking for genes shared by families prone to the disorder. Now researchers taking a new approach have begun to unlock its secrets.
Scientists are starting to open their DNA databases online, creating a network that could pave the way for gene analysis at a new scale.
Nations agree to start drafting climate action plans, which could encourage greater investment in clean energy.
Equipment for making microchips has led to solar cells that are twice as efficient as conventional ones.
Severe droughts are forcing researchers to rethink how technology can increase the supply of fresh water.
Hybrids are a much more cost-effective way to reduce carbon emissions than newly released hydrogen fuel cell cars.