With a few applications, however, you can transform your iPhone into a trackpad or your iPad into an external display and control desktop applications like Keynote and iTunes right from your mobile device.
Population is a complicated topic. With the worldwide population slated to top 7 billion in 2011, we decided it was one we needed to tackle. But we wanted to do it in a way that gives readers room to think. We spread out our coverage over a year, with articles that take deep dives into specific issues—demographics, food security, climate change, fertility trends, managing biodiversity— that relate to global population. Our reporting is collected here. Feel free to explore and share your thoughts on twitter at #7billion.