Did anyone happen to see this most interesting BBC program the other day ?
BBC wrote:
Horizon - 2011-2012 - 4. The Core
It is available on the BBC IPlayer until 9:59PM Wed, 21 Sep 2011 at the following links.
http://www.bbc.co.uk/i/b0148vph/ http://www.bbc.co.uk/iplayer/episode/b0 ... _The_Core/ For centuries we have dreamt of reaching the centre of the Earth. Now scientists are uncovering a bizarre and alien world that lies 4,000 miles
beneath our feet, unlike anything we know on the surface. It is a planet buried within the planet we know, where storms rage within a sea of
white-hot metal and a giant forest of crystals make up a metal core the size of the Moon.
Horizon follows scientists who are conducting experiments to recreate this core within their own laboratories, with surprising results.
Broadcast on BBC Two, 9:00PM Wed, 31 Aug 2011 - Available until 9:59PM Wed, 21 Sep 2011 Categories Factual, Science & Nature - Duration 60 minutes
it showed how they can now tell how the center of the Earth is solid and about as large as the moon ! Also showed how the magnetic field is slowly changing and will likely swap around so Nth is Sth (as it were) - but they estimate that this will take about 700yrs.
Now this kind of change is apparently already effecting Satellites and they have to be turned off when they pass a magnetic field change ... (Southern hemisphere, and I think they said planes too had to make some changes too. I have concerns about the possibility of changes to the jet stream which will effect many many weather / climate patterns. I wonder if this is what really caused the dinosaur decline ?
Someone else I know pointed out that this would change cloud patterns that cannot be rectified....