In this photo taken Wednesday, July 11, 2012 and made available Sunday, July 15, 2012, a hand holds the younger of a pair of twin giant panda cubs born at the panda research center in Wolong in southwest China's Sichuan province.

Tourists play with the mud during the 15th annual mud festival on Daecheon Beach in Boryeong, South Korea on Sunday, July 15, 2012. The festival features mud wrestling, mud sliding and mud king contest.

Revelers hold torches as they take part in 'Correfoc' (Run with fire) party in Barcelona, Spain on Sunday, July 15, 2012. Correfocs or "fire-runs" are among the most striking features present in Catalan festivals. In the correfoc, a group of individuals will dress as devils and light fireworks. While dancing to the drums of a traditional gralla, they will set off their fireworks among crowds of spectators.

The sun rises Sunday, July 15, 2012, in Pleasant Plains, Ill. Corn stalks are struggling in the heat and continuing drought that has overcome most of the country. All of Illinois is officially in a drought, and Illinois Gov. Pat Quinn plans a trip to southern Illinois to discuss the state's plans for responding to dry conditions.

A competitor celebrates his team's victory of a swamp football match in a man-made mud pool in Beijing, China on Sunday, July 15, 2012. The sports, which originated from England, is usually played in a bog or swamp and in the Beijing games, the rules require at least one female competitor in each team.

Participants in the Duhnen tideland event race their horses through the mud in Duhnen, near Cuxhaven, northern Germany on Sunday, July 15, 2012.