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686.98 Earth days or 1.88 Earth years. Now, given that a day(sol) on Mars is longer than on Earth.</span>
As the Olmec declined, the Mayans rose to prominence. Historical evidence seems to indicate the presence of a Mayan culture in present day Mexico at least as far back as 1800 BCE, but their greatest influence was exerted between 200 B.C. and A.D. 1000.
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Answer:
Technology helps to show the future path of earth's ecological system and tells about the growing concerns of the rainforest.
Explanation:
- Technology is being used as an aid to protect and monitor the environment with regard to environmental conservation and preservation.
- Technology like the use of GIS and remote sensing through satellites, GPS are used to mark the hotspots of biodiversity that need to be protected and kept away from the people.
- Loss of trees and natural vegetation plays a major role in climate change and leads to desertification.
- Thus large-scale awareness among people is required to make them understand to meaning of sustainable development and judicious use of the earth's precious resources.
The main stems
of 38 rivers in the United States are at least 500 miles (800 km) long.
The main stem is "the primary downstream segment of a river, as
contrasted to its tributaries".[1] The United States Geological Survey (USGS) defines a main-stem segment by listing coordinates for its two end points, called the source and the mouth. Well-known rivers like the Atchafalaya,[2] Willamette,[3] and Susquehanna[4] are not included in this list because their main stems are shorter than 500 miles