Coal occupies a central position in modern human endeavors. Last year over 7000 megatons were mined worldwide. Powerful, yet dirty and dangerous, use of coal is expanding every year, with 2010 witnessing a production increase of 6.8%. Around 70 countries have recoverable reserves, which some estimates claim will last for over a hundred years at current production levels. Mining for coal is one of the world's most dangerous jobs. While deadliest in China, where thousands of miners die annually, the profession is still hazardous in the West and other regions as well. Our mining and use of coal accounts for a variety of environmental hazards, including the production of more CO2 than any other source. Other concerns include acid rain, groundwater contamination, respiratory issues, and the waste products which contain heavy metals. But our lives as lived today rely heavily on the combustible sedimentary rock. Over 40% of the world's electricity is generated by burning coal, more than from any other source. Chances are that a significant percentage of the electricity you're using to read this blog was generated by burning coal. Gathered here are images of coal extraction, transportation, and the impact on environment and society. The first eight photographs are by Getty photographer Daniel Berehulak, who documented the lives of miners in Jaintia Hills, India. -- Lane Turner (48 photos total)

For the first time ever, young athletes gathered Jan. 13-22 in Austria for the Winter Youth Olympic Games. The event began with traditional opening ceremonies for more than 1,000 competitors from more than 70 nations. Ranging in age from 14 to 18, they competed in the 15 core events held at the Olympic Games. Keep an eye out for the names you see here, as they may appear again in Sochi, Russia, during the XXII Winter Olympics in February 2014. -- Lloyd Young (29 photos total)

A massive demonstration of Egyptians gathered in Tahrir Square in Cairo today to mark the anniversary of the uprising that eventually led to the ousting of President Hosni Mubarak. Political divides are still in force with liberals and Islamists differing on their visions for the future of the country. Mubarak is now on trial for complicity in the deaths of protesters. The uprising in Egypt last year was one of the initial protests of what is called the Arab Spring, which has included the slaying of Libyan leader Moammar Khadafy and the ongoing protests in Syria. -- Lloyd Young (31 photos total)

The lunar new year is celebrated throughout the world, but especially in Asia when the lunisolar calendar ticks off a new cycle. This year is the Year of the Dragon on the Chinese zodiac, and is viewed as very auspicious. In China, the holiday is known as 春节, the Spring Festival, and kicks off 15 days of celebration. It also triggers the largest human migration in the world, as hundreds of millions of Chinese trek to see families. Gathered here are images of the preparation for the holiday, the travel scene in mainland China, and celebrations in many parts of the world. 新年快乐! -- Lane Turner/雷恩 (38 photos total)

The annual Harbin International Ice and Snow Festival has been held since 1963, interrupted for a number of years during the Cultural Revolution until it was resumed in 1985. Harbin is the capital of Heilongjiang province, in northeastern China. It is nicknamed "Ice City" and aptly so for winter January temperatures that average minus 18 degrees Celsius, under the influence of the cold winter wind from Siberia. The festival officially starts January 5th and lasts one month, although exhibits often stay open longer, weather permitting. Harbin is one of the world's four largest ice and snow festivals, along with Japan's Sapporo Snow Festival, Canada's Quebec City Winter Carnival and Norway's Ski Festival. -- Paula Nelson (28 photos total)

The search continued for those still missing after the Costa Concordia luxury cruise ship smashed into a reef off the coast of Giglio, Italy, and partially sank last weekend. Eleven deaths were confirmed on Tuesday. The ship’s captain, Francesco Schettino, has been accused of manslaughter by prosecutors after he left the ship before all passengers were evacuated. -- Lloyd Young (34 photos total)

Kalachakra is an ancient ritual that involves a series of prayers, meditations, dances, chants, vows and the construction of a large sand mandala - all with the aim to bring world peace. Kalachakra 2012 began January 1 and lasted for ten days in the northern Indian state of Bihar. The Dalai Lama, the Tibetan Spiritual Leader, gave teachings and participated over the course of the festival. -- Paula Nelson (41 photos total)

Traversing over 8000 miles through Argentina, Chile, and Peru, the Dakar rally pits drivers and riders against each other and against extreme terrain. The 14-stage race attracts competitors from over 50 countries to race 465 vehicles - motorcycles, quad bikes, cars, and trucks - through deserts, rivers, and mountains. The race has seen its share of tragedy over the years, and the 2012 edition is no different, with Argentine motorcycle rider Jorge Boero dying after a crash near the end of the very first stage, and two spectators dying when their ultralight aircraft crashed. Begun on January 1st, the race concludes Saturday in Lima, Peru. -- Lane Turner (37 photos total)

Tomorrow marks the second anniversary of the devastating earthquake that killed about 300,000 people. President Michel Martelly in a report from earlier this week said that 800,000 Haitians are living without electricity, 500,000 can’t read or write, and 8 out 10 live on less than $2 a day. Though half of the rubble has been cleared and reconstruction has begun, Haiti has a long way to go in its recovery effort. Collected here are images made available by wire services leading up to the anniversary. -- Lloyd Young Please see Earthquake in Haiti for the initial post after the quake. (25 photos total)

The United States and allied forces have been in Afghanistan for over ten years, an occupation that approaches the 2014 deadline for a full withdrawal of those forces. As the transition draws closer, problems with security, the economy, and cultural mores are growing even more apparent. Included in this monthly look at Afghanistan are images that highlight these issues, as well as images that point to a more hopeful future. The activist group YoungWomen4Change prepares posters demanding women's rights even as the horrific torture of 15-year-old Sahar Gul, who refused her husband's family's demands that she become a prostitute, came to light. Also included here are images of another Afghan girl, 12-year-old Tarana Akbari, who witnessed the terrible suicide bombing in Kabul that killed at least 80 Shiites during observances of the Ashura holiday. The bombing has raised fears of renewed sectarian violence. -- Lane Turner (37 photos total)

More than 20,000 photographs, from over 130 countries were submitted to the National Geographic Photography contest, with both professional photographers and amateur photo enthusiasts participating. The grand prize winner was chosen from the three category winners: Nature - Shikhei Goh, People - Izabelle Nordfjell, Places - George Tapan. Shikhei Goh, of Indonesia, took the grand prize honors with his amazing photograph of a dragonfly in the rain and will be published in the magazine. The competition was judged on creativity and photographic quality by a panel of experts composed of field biologist and wildlife photojournalist Tim Laman, National Geographic photographer Amy Toensing and National Geographic nature photographer Peter Essick. The winning submissions can be viewed at http://ngm.nationalgeographic.com/ngm/photo-contest/ - Paula Nelson (14 photos total)

Around the world people celebrated with fireworks, kisses, blessings, gatherings, cheers, watching the sunrise and plunges into icy bodies of water to welcome in a new year. Here's a look back at how some of them marked the transition. -- Lloyd Young (41 photos total)