Ocre wrote:True north is on the move. What if the earth tilts further and further till Antarctica is close to the equator and warms up again. Places that are warm and nearest to the equator now roll over to contain the new poles. To those places a deep freeze. There very own localized ice ages. The entire earth tilting over its axis over! Imagine that.
I think we have way more to learn than a lot of ppl think. Much of our current "understandings" will be completely turned on its side. Our earths tilt should be disturbing as its not common among our neighbors. Venus, Mars, even our own moon remain solidly in the same plane as the sun. As a matter of fact all the planets in our solar system rotate with the sun on the same Ecliptic Plane except for Earth. Earth is a whopping 23.5 degrees off. The other exception is Mercury. You may have heard about Mercury's strange orbit, but it ony moves 7 degrees off the ecliptic plane and this is considered a significant amount. The other planets are nearly perfect, our moon is perfectly on the suns plan. Earth is the grand exception. This is more than interesting.....
True north moves because the earth wobbles slightly on its axis. There is little danger of further tilt without a very significant event occuring (moon shifting its orbit significantly, meteor impact etc). If Antarctica does move anywhere it will be due to continental drift/tectonic plate activity.True north is on the move. What if the earth tilts further and further till Antarctica is close to the equator and warms up again.
The angle of the Earth's tilt is relatively stable over long periods of time. The tilt does undergo nutation; a slight, irregular motion with a main period of 18.6 years. The orientation (rather than the angle) of the Earth's axis also changes over time, precessing around in a complete circle over each 25,800 year cycle; this precession is the reason for the difference between a sidereal year and a tropical year. Both of these motions are caused by the varying attraction of the Sun and Moon on the Earth's equatorial bulge. From the perspective of the Earth, the poles also migrate a few meters across the surface. This polar motion has multiple, cyclical components, which collectively are termed quasiperiodic motion. In addition to an annual component to this motion, there is a 14-month cycle called the Chandler wobble. The rotational velocity of the Earth also varies in a phenomenon known as length of day variation.
A group of Russian scientists in Antarctica has succeeded in drilling to a lake buried two miles beneath the icy landmass, the state-run Russian news service Ria Novosti reported -- following a week of radio silence from the team that had some scratching their heads.
“Yesterday, our scientists stopped drilling at the depth of 3,768 meters and reached the surface of the sub-glacial lake,” the source reportedly said in a story posted Monday, Feb. 6.
An unnamed source with Russia's Federal Service for Hydrometeorology confirmed the news as well, Russian business newspaper The View reported.
Breakthrough! Russian scientists drill into Antarctic lake buried under the ice for 20 million years, amid extraordinary claims the Nazis may have got there first
Drilling successful as scientists break through into lake buried miles under Antarctic ice
Lake could have 'unique life forms' say scientists
News agency claims that hidden Nazi stronghold nearby could contain Hitler's archives
Described as 'unassailable fortress for the Fuhrer' - and could contain Hitler and Eva Braun's remains, says agency
Lake has had no contact with man-made pollutants or Earthly life forms for millions of years
By Rob Cooper and Thomas Durante
Last updated at 9:24 AM on 7th February 2012
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