Will the distant future give rise to exhibits of a human past long gone, much as we gawk today at representations of a dinosaur age we can only imagine? Aamir Qureshi/AFP/Getty Images hide caption

itoggle caption Aamir Qureshi/AFP/Getty Images

Villages in the Lower Shire valley of Malawi, like this one named Jasi, rely heavily on subsistence farming and steady rainfall, and are struggling to produce steady harvests. Jennifer Ludden/NPR hide caption

itoggle caption Jennifer Ludden/NPR

Somali refugees lead their herds of goats home for the night outside Dadaab, Kenya. A new study shows that animals in many parts of the developing world require more food — and generate more greenhouse emissions — than animals in wealthy countries. Rebecca Blackwell/AP hide caption

itoggle caption Rebecca Blackwell/AP

We face real-world decisions now about everything from sea level rise, to energy infrastructure to what food is best for you. Karen Bleier/AFP/Getty Images hide caption

itoggle caption Karen Bleier/AFP/Getty Images

The Larsen B ice shelf on the Antarctic Peninsula, which is among the places where such ice has been breaking off. Mariano Caravaca /Reuters/Landov hide caption

itoggle caption Mariano Caravaca /Reuters/Landov

A police officer guards Cambodia's famed temple of Angkor Wat. The powerful city-state collapsed in 1431 after suffering through two decades of droughts. Heng Sinith/AP hide caption

itoggle caption Heng Sinith/AP

Two Iberian lynxes at a nature reserve in northern Spain. (February 2006 file photo.) Victor Fraile /Reuters /Landov hide caption

itoggle caption Victor Fraile /Reuters /Landov

World War Z is just the latest pop-culture incarnation of the Zombie Apocalypse. Adam Frank says the zombies keep coming because they're trying to tell us something. MPC/Paramount Pictures hide caption

itoggle caption MPC/Paramount Pictures

The Capitol dome is seen behind the Capitol Power Plant, which provides power to buildings in the Capitol complex in Washington, D.C. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP