Earth
| Use attributes for filter ! | |
| Population | 7. 53 billion (2017) |
|---|---|
| View on Maps | google. com/maps/space/earth |
| Radius | 6,371 km |
| Age | 4. 543 billion years |
| Distance from Sun | 149. 6 million km |
| Did you know | The earth is approximately 92,955,820 miles away from the sun. |
| Date of Reg. | |
| Date of Upd. | |
| ID | 596623 |
About Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4. 5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite.
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Vikings settled in North America in 1021AD, study says
Vikings had a settlement in North America exactly one thousand years ago, centuries before Christopher Columbus arrived on The Continent , a study says.
Scientists say a new dating technique analysing tree rings has provided evidence that Vikings occupied a site in Newfoundland, Canada, in 1021AD.
It has long been known that Europeans reached the Americas before Columbus's arrival in the New World in 1492.
But this is the First Time researchers have suggested an exact Date .
, Scientists said they had analysed The Tree rings of three pieces of wood cut for the Norse settlement at L'Anse aux Meadows.
They said that using an atmospheric radiocarbon signal produced by a dated solar Storm as a reference, they were able to pin the " exact felling year of The Tree " to 1021.
VIDEO: BACKGROUND:Such a solar Storm - a huge blast of radiation from The Sun that hits Earth - was known to have taken place in the year 992AD, The Scientists said. This enabled them to determine a more accurate Date than previous estimates for The Camp of about 1000AD.
" The Association of these pieces with the Norse is based on detailed research previously conducted by Parks Canada , " the study says, adding that there was clear evidence the sampled wood had been modified by metal tools.
It adds that the L'Anse aux Meadows camp was a base from which other locations, including regions further south, were explored.
The authors say The Discovery represents a definitive point for future research into The Initial consequences of transatlantic activity, such as the transfer of knowledge and the potential exchange of genetic information and pathologies.
L'Anse aux Meadows, a Unesco world heritage site on the northernmost tip of The Island of Newfoundland, is The First and only known site established by Vikings in North America and the earliest evidence of European settlement in the New World .
Radiocarbon Dating is a technique that measures residual concentrations of a radioactive isotope of carbon (carbon-14) present in an object.
Carbon-14 decays over time and measuring how much is left tells you the Age Of a sample.
You may be interested to watch: Media caption, Can Viking Video Games teach history in school?Source of news: bbc.com
Earth Photos
