Solar cells have ridden to success on the backs of other products for decades. First, NASA used the cells in space. Then oil companies stuck them onto off-shore oil rigs. Later, calculators and other small electronics started to include them to generate tiny amounts of power. Now, Katie Fehrenbacher of GigaOm looks at a natural evolution of this trend that's been very underlooked. What if Apple began to include solar cells in its products to extend their batteries' lifespans?
Colorado is now well into its first year as the first state to legalize recreational marijuana. How's it going? James Hamblin visits Aspen.