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Breaking News: Laser experiments lend insight into metal core at heart of the Earth - News Paper-News of the United States was founded in 1933 by David Lawrence (1888-1973), which also started the World Report in 1946. The two magazines are covering national and international news separately, but Lawrence combines them into news reports of U.S. in World and 1948 [1] and Later sold the magazine to its employees. Historically, this magazine tends to be a bit more conservative than the two main competitors, Time and Newsweek, and focus more on the story of economic, health, and education. It's also distancing news, entertainment and sports celebrities. [2] an important milestone in the history of the beginning of the magazine is including the introduction of the "Washington Whispers" column in 1934 and the column "News You Can Use" in 1952. [3] [4] in 1958, the circulation of the weekly magazine passed one million and two million in 1973. (
wikipedia) Breaking News: Laser experiments lend insight into metal core at heart of the Earth - News Paper
An international team of researchers carried out sophisticated experiments to replicate conditions at the Earth's core.
 |
Nitrogen is the dominant gas in Earth's atmosphere, where it is most-commonly bonded with itself in diatomic
N2 molecules. New work indicate that it becomes a metallic fluid when subjected to the extreme pressure
and temperature conditions found deep inside the Earth and other planets
[Credit: Alexander Goncharov] |
Using high energy laser beams and optical sensors, they were able to observe how samples of nitrogen behaved at more than 1 million times normal atmospheric pressure and temperatures above 3,000C.
Their observations confirmed that, under such conditions, nitrogen exists as a liquid metal.
The findings give scientists valuable insight into how nitrogen behaves at extreme conditions, which could aid understanding of how the planets were formed.
It may help to explain why Earth is the only planet known to have an abundance of nitrogen in its atmosphere - where it exists as a gas. Nitrogen in the air could emerge from deeper within the planet, where, for example, it could mix with other liquid metal.
 |
| P-T phase diagram of nitrogen [Credit: JIANG Shuqing] |
The findings could also shed light on how the planet's atmosphere evolved and how it may develop in future.
Their study, carried out by the University of Edinburgh with researchers in China and the US, was published in
Nature Communications. It was supported by the Engineering and Physical Science Research Council and the British Council.
Dr Stewart McWilliams, of the University of Edinburgh's School of Physics and Astronomy, who took part in the study, said: "Earth's atmosphere is the only one of all the planets where nitrogen is the main ingredient - greater even than oxygen. Our study shows this nitrogen could have emerged from deep inside the planet."
Source: University of Edinburgh [July 06, 2018]
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Breaking News: Laser experiments lend insight into metal core at heart of the Earth - News Paper
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