研究：土星卫星土卫六拥有巨大的甲烷冰层 New research suggests Saturn’s moon Titan has a thick ice cover that could be warming lower areas and supporting molecular growth.

研究人员：非洲大象数量急剧下降 African elephants are Earth's largest land animals.

佛罗里达州和联邦政府支持大型项目以清理大沼泽地 Some experts say damage to the Everglades ecosystem began when a highway connecting the cities of Tampa and Miami in Florida was built in 1928.

巨大的冰山可能威胁南大西洋的企鹅 Scientists are worried that a large iceberg heading toward an island in the South Atlantic Ocean could threaten wildlife there.