Based at the University of Michigan, the Undocumented Migration Project (UMP) is a long-term anthropological study of undocumented migration between Mexico and the United States that uses ethnography, archaeology, and forensic science to better understand this clandestine social process.
Ami is touring the United States as one of the featured National Geographic photographers of the National Geographic Live series. Skillshare came with me to Venice Beach, California, to share tools and practices of documentary photography for a class you can take online. Kilifi is an 18-month-old rhino that Kamara is currently hand-raising along with three other baby rhinos at Lewa Wildlife Conservancy in Kenya. The Arctic Ocean's sea ice is in a "death spiral" due to rising temperatures, scientists said in 2008. Polar bears—like this one leaping between ice floes in Svalbard, Norway's Hinlopen Strait—live on the Arctic ice, hunting seals and other fatty marine mammals. Permafrost—the frozen soil that forms the backbone of the Arctic tundra—is melting due to climbing global temperatures. Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere. Freezing water from beneath Earth's surface forces the ground upward in Canada's Mackenzie River delta. Caribou—such as this large-antlered specimen silhouetted by Alaska's northern lights—are being affected as global warming accelerates in the Arctic.
A forest of dead spruce trees near Homer, Alaska, is the victim of a tiny beetle that has boomed in the state's milder winters. The Inuit, a group of indigenous people living in the Arctic, are finding their land and cultures rapidly changing as climate change deepens its grip. The National Geographic Society aims to be an international leader for global conservation and environmental sustainability.

Together, we capture the sunrise over the ocean and meet the surfers and skaters enjoying the beach. Kamara spends 12 hours every day, sometimes in pouring rain, watching over the vulnerable baby rhinos. Loisaba is an important elephant corridor, with more than 800 elephants spending significant time there, and it plays a critical role in maintaining ecological connectivity between Laikipia and Samburu. Many marine species, such as these narwhals swimming through a bay in Nunavut, Canada, depend on the ice throughout their life cycles. But as the ice vanishes, some experts predict this predator will also disappear from the Arctic by 2050.
In Alaska, the mercury may rise by 1 to 5 degrees Celsius (1.8 to 9 degrees Fahrenheit) by 2100. Though the features occur naturally in some parts of the Arctic, many scientists suspect that rising temperatures are causing more to form. Much of the basin is made up of permafrost, a layer of frozen soil in Earth's polar regions. In Greenland, caribou time their births to coincide with the blooming of tundra vegetation. Since the mid-1970s, about 50 percent, or 1 million acres (400,000 hectares), of the Kenai Peninsula's adult spruce trees have succumbed to the spruce bark beetle. But as temperatures rise, thicker, taller shrubs are spreading throughout the region, raising the likelihood for more fires in coming years.
As ice declines, so does the number of days available for Inuit to hunt for animals such as seals and walrus.
When individuals pledge to use less water in their own lives, our partners carry out restoration work in the Colorado River Basin.

In this false-color image of Alaska's North Slope, taken by NASA's Terra satellite, the blue-black color shows the many ponds of meltwater that collected on the coast in July 2007.
Until 2003, thermokarsts—such as this one, located about 155 miles (about 250 kilometers) north of the Arctic Circle—were unheard of in northern Alaska. Loss of permafrost due to climate change in Canada's Northern Territories may increase runoff and sediment flowing into rivers and make some slopes more unstable and vulnerable to landslides.
But as climate change causes plants to peak earlier, caribou newborns that eat the plants face tougher odds for survival.
The swaths of downed trees may actually turn forests from carbon sinks to sources, according to an April 2008 study. Tundra burning may also release more organic carbon, a greenhouse gas currently stored in the soil, into the atmosphere. Shifting winds are also reshaping ice formations used as landmarks for generations, making navigation more difficult. For instance, when dead trees decompose, they release the greenhouse gas carbon dioxide into the atmosphere.
But, as Theo Ikummaq of Canada's Nunavut Province said, "We have lived in this region for centuries and we will continue to.

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