November 14 2011

Australia

Urambi Roos/2 Kangaroos Jumping Over Grass in the Afternoon With golden Yellow Sun Flare, Australia

(© Richard Marris Photography/Flickr/Getty Images) ©

Japan, New Zealand, United States

Sheepdog Guards a Flock of Sheep in the Tatra Mountains, Poland

(© Henryk T. Kaiser/Age Fotostock/Photolibrary) ©

China, Germany, France, United Kingdom, Canada

City Wall and Watch Tower in San Juan, Puerto Rico

(© Zhang Jun/Xinhua Press/Corbis) ©

March 06 2010

Australia

Horseshoe Falls Surrounded by Rainforest in the Mount Field National Park,Tasmania,Australia
Jochen Schlenker/Getty Images ©

The Great American Clean Up

Japan

Eastern Gray Kangaroo Mother Carrying Joey In Pouch,Australia
Frans Lanting/Photolibrary ©

China

Narwhal Whales Group in an Ice Break near Baffin Island,Nunavut,Canada
Minden Pictures/Masterfile ©

Germany

Stained Rocks and Trees,Rocks National Lakeshore,Munising,Michigan,US
Claudia Adams/Danita Delimont ©

United Kingdom ,United States, Canada, New Zealand

Typical Spanish Colonial Architecture in Cartagena,Columbia
PhotoLatino/eStock Photo ©

August 31 2009

Japan, Germany

Shadow Play, Cambodian Shadow Theatre, Phnom Penh, Cambodia
SIME/eStock Photo ©

United Kingdom, United States, Canada, New Zealand

Aerial View of Langkawi Sky Bridge, Malaysia
Chan Shu Kai/Corbis ©

Australia

Gray Kangaroo feeding on Wattle FlowersJason Edwards/Getty Images ©

China

Sichuan home town of Hope Primary School of Yan
Xiao-Yun / Chongqing flower diagram Culture Communication Co., Ltd. ©