Archaeologists Found 12 Thousand Year Old Steel

      Archaeologists have found a steel mine oxide was 12 thousand years in Chile, which is a testament to mine the oldest ever found.

The report will be published in the journal Current Anthropology menungkap that the team of researchers led by Diego Salazar of the Universidad de Chile, discovered 40 meters deep mines in the coastal city of Taltal, southern Chile.
The mine was dug by people Huentelauquen, who first occupied the area. Similarly, as quoted by Eurika Alert.

People Huentelauquen using steel oxide to color the stones and bones made ​​their accessories. "Perhaps also to color their bodies and clothing," said the researchers.

"This proves that mining has been known for a long time, and requires special skills," wrote Salazar in Current Anthropology.

Approximately 700 cubic yards and 2 thousand tons of rock excavated from the mine. Age of carbon found in charcoal and shells in mine hinted that the site is 12 thousand years old, which is then used back approximately 4,300 years ago.

"Exploitation of more than a thousand years in the mine, indicating knowledge about the location, the substance contained therein, as well as excavation techniques, has been handed down over the centuries by the people Huentelauquen," wrote the researchers.

Prior to this discovery, an ancient copper mines were also found in North America that was approximately 4500 out

Sumber :
adipedia.com

Bacteria that can survive radiation

     The word radiation is a word that is familiar among us. In the physical sciences of physics, radiation describes any process in which energy moves through the media or through space, and eventually absorbed by other objects. Radiation was dangerous, but some are very dangerous. Examples of radiation is dangerous is nuclear radiation. This time, Serupedia not be much more to discuss radiation. But will talk about small animals that can survive radiation.
D. Radiodurans is the name of bacteria that can live and survive from radiation. He was able to withstand the radiation doses a thousand times stronger than a human acceptable dose. This ability is acquired because his DNA recovery system is unique. These organisms may still be alive in radiation exposure many times more than the amount generally kill other organisms. Chromosome D. radiodurans can be formed even after destroyed by radiasi.Oleh therefore, D. radioduransadalah organisms most tolerant of DNA damage have been identified

D. radiodurans was first detected by Anderson et al. in 1956 in the canned meat sterilized with radiation and X-rays were not irradiated. Remarkably, despite sterilized but still occurs in meat spoilage microorganism activity that concluded there was in it.

Man who received radiation generally die from the radioactive particles destroy DNA. As a result, the body's regulatory system was halted. However, it is not a bacteria, it is amazing he was able to reconstruct his DNA had been destroyed.

One of the problems encountered when people try to live on the moon or Mars, is a pretty deadly radiation. If the bacteria are released in the air, the radiation there will not be able to affect the body.

So, if one day we might have been able to explore space and its planets, do not be surprised if one day we can find a creature like this in there.

Indonesia The Best Looking Asteroid DA14

Indonesia is the best place to see the asteroids that pass near Earth. So said Deputy Science Aerospace Research and Information National Aeronautics and Space Agency (Lapan), Prof. Dr. Thomas Djamaluddin.

"Best area to see the asteroid is in Indonesia because the asteroid is passing south of the sky," said Thomas, Friday (02/08/2013).

Asteroids, said Thomas, will look and reflect sunlight on a Saturday morning February 16, 2013 at around 2:26 pm.

Indonesia has the closest distance to see the asteroid. The closest point to the earth is only about 21,000 km, in the orbit of the GPS satellites.

"Almost the whole of Indonesia can see the asteroid, but must use a telescope, can not with the naked eye," he added.

2012 DA14 Astreoid it would seem like a dim star passing rapidly from the sky relative Southwest towards the Northeast.

Asteroid 2012 DA14 called the estimated size of about 45 meters will pass very close to Earth. The asteroid this time it did not affect anything else on earth, including the work does not interfere with satellites in earth. However, within 97 years, or rather February 16, 2110, is estimated to potentially grind the earth.

Thomas explains, potential asteroid measuring 45 meters if it hit the Earth will have roughly similar to the Tunguska impact on June 30, 1908 that destroyed forests in Siberia Jakarta area, which means the impact destroyed the region roughly equivalent to the big city.

Asteroids in general are objects of the solar system consisting of rocks and minerals are mostly frozen metal is in a belt between the orbits of Mars and Jupiter.