Do you know that only 1 percent of Earth's water is usable and 0.3 percent of it is stored in wetlands, rivers and lakes?Our world is facing an increasing scarcity of w
File photo shows the national flags of China (R) and the United States as well as the flag of Washington D.C. on the Constitution Avenue in Washington, capital of the U
A handout video-grabbed image made available by NASA on May 31, 2020 shows the SpaceX Crew Dragon approaching to dock to the International Space Station (ISS), on May 3
Photo taken on April 27, 2020, shows people posing for a photo with the face masks donated by China's Fujian Province to the U.S. state of Oregon.Oregon Governor Kate B
简体中文
