October 31, 2011, was notable not only for the annual ritual of candy and costumes, but also for its designation by the United Nations as the date when global population reached seven billion. Although just an estimate – demographers are not able to count individuals in real time on such a large scale – the event was an important opportunity to present population trends to the media and public dialogue. Several babies born that day were named the “seven billionth;” in Russia, where various incentives have been implemented to try to boost an ultra-low fertility rate, Vladimir Putin visited a maternity ward to greet one of them.

A woman sat crouched on the side of a busy road in Dakar, a baby in a sling on her back and a basket of peanuts in front. I know only a little French, and no Wolof, but I decided to try anyway. “Bonsoir,” I said, and smiled at the toddler beside her. “Combien?” I asked, pointing at the peanuts.

She smiled back at me, we negotiated a sale, and in exchange for the coins in my pocket I walked away with a few bags of the small, tasty nuts that are grown throughout the “peanut basin” of central Senegal.

The original version of this article, by Carl Haub, appeared on Demographics Revealed.

Few terms in demography can cause more confusion than “urbanization.” News stories reporting projections of world urbanization are nearly always accompanied by photographs of places such as London or Shanghai, and it does seem rather natural to think of urbanization in those terms.

Mexico’s 2012 elections were important for a host of reasons: the PRI party returned to power after 12 years of rule by the more conservative PAN; there was the first female presidential candidate from a major political party; and turn-out was historically high. They also proved that Mexico’s young people are not as apathetic as some may have thought, with the emergence of the #YoSoy132 student movement demanding fair press coverage.

The original version of this article, by Michael Kugelman, appeared on The Diplomat.

On May 11, Pakistan’s Election Day, approximately 60 percent of eligible voters went to the polls. This figure far exceeded the 44 percent who turned out for Pakistan’s previous election in 2008. Media reports have featured moving accounts of the elderly being carried to the polls, and of women standing in the heat for hours to cast their ballots.

The 2011-12 West African food crisis led to riots in Senegal and Burkina Faso as well as food insecurity for millions of rural and urban poor across the region. The crisis emerged from a number of factors, including instability in northern Mali, increases in global food prices, and low rainfall in the 2010-2011 and 2011-2012 growing seasons. Many countries in the region are now reassessing and expanding domestic agricultural capabilities. At the top of the agenda for Senegal, a democratic republic on track to reach many Millennium Development Goals, is reducing youth unemployment and increasing domestic agricultural capacity.

Today, the Sahara Desert is a vast, nearly lifeless expanse of sand and rock. But ancient cave paintings tell of a time when it was fertile grassland and bands of human hunters chased aurochs and antelope.