Conclusions of archeologists were based on artifacts found over a large area. Exact dates cannot always be determined, and scientists don't always agree on the data provided by the evidence. New discoveries may contradict theories that have already been accepted.
Cactus Hill site has human remains that have been dated to about 20,000 years ago. Due to its location in Virginia proves that human beings had arrived in America earlier than this. That data contradicts the theory that claims that humans reached America from Siberia through the modern day Bring Strait.
The Cactus Hill Archaeological Site is located on a wind-deposited terrace of the Nottoway River in Sussex County.
A- a great diversity of cultures
The important contribution to navigation made by Eratosthenes in the third-century bc was a reasonably accurate calculation of the circumference of our planet.
Who is Eratosthenes?
Eratosthenes was born in 276 BC and died in 194 BC. He was a well-known poet, mathematician, a researcher in geography, and theorist of music. He was the first to gauge the size of the planet.
The Earth was first measured by Eratosthenes of Cyrene. The precise measurement of Earth's circumference was greatly aided by Eratosthenes' work in the third-century bc.
As a result, the Eratosthenes in the third century bc accurate calculation of the Earth.
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