South America’s sticky tar pits Additional Information Share this:EmailFacebookTwitterPinterestRedditGoogle ClassroomPrint By Science News Explores December 19, 2011 at 6:16 pm Power Words ecosystem: the living things and the environment in a community sediments: silt, sand or rock moved by water, wind or glaciers ice ages: periods of time when glaciers covered a large part of Earth carbon-dating: a way to tell how old the remains of something once living are by measuring the amount of a type of carbon millenia: thousands of years; 1,000 years is called a millenium savannah: a flat grassland with little or no trees in a hot and dry climate Return to article