TF阅读真题第830篇Dating Ancient Art

The Greek City-States: Sparta and Athens Of the hundreds of city-states that evolved during the Archaic Age, (800- 479 B.C.), Sparta and Athens stand out for their vividly contras...

TF阅读真题第811篇Dorset Culture

TF阅读真题第813篇when honeybees become foragers

TF阅读真题第823篇The Radiocarbon Dating of Prehistoric American Sites

TF阅读真题第825篇Fire Disturbance and Landscape Patterns

TF阅读真题第826篇Habitat Selection by Birds

Life in an Estuary An estuary is the wide part of a river where it flows into the sea. It is affected by both marine influences(tides, waves, and the influx of saline water) and ri...

Early Astronomy As surviving records and artifacts make abundantly clear, many early cultures took a keen interest in the changing nighttime sky. But unlike today, the major drivin...

Agriculture and the classic Maya Collapse       The Classic Maya civilization, which flourished in the lowlands of what is now southern Mexico and Central America ...