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Global Warming: Medieval Era Hotter than Today
The London Telegraph ^ | 06/04/2003) | Robert Matthews

Posted on 04/06/2003 11:04:51 AM PDT by Francohio

Middle Ages were warmer than today, say scientists

By Robert Matthews, Science Correspondent (Filed: 06/04/2003)

Claims that man-made pollution is causing "unprecedented" global warming have been seriously undermined by new research which shows that the Earth was warmer during the Middle Ages.

From the outset of the global warming debate in the late 1980s, environmentalists have said that temperatures are rising higher and faster than ever before, leading some scientists to conclude that greenhouse gases from cars and power stations are causing these "record-breaking" global temperatures.

Last year, scientists working for the UK Climate Impacts Programme said that global temperatures were "the hottest since records began" and added: "We are pretty sure that climate change due to human activity is here and it's accelerating."

This announcement followed research published in 1998, when scientists at the Climatic Research Unit at the University of East Anglia declared that the 1990s had been hotter than any other period for 1,000 years.

Such claims have now been sharply contradicted by the most comprehensive study yet of global temperature over the past 1,000 years. A review of more than 240 scientific studies has shown that today's temperatures are neither the warmest over the past millennium, nor are they producing the most extreme weather - in stark contrast to the claims of the environmentalists.

The review, carried out by a team from Harvard University, examined the findings of studies of so-called "temperature proxies" such as tree rings, ice cores and historical accounts which allow scientists to estimate temperatures prevailing at sites around the world.

The findings prove that the world experienced a Medieval Warm Period between the ninth and 14th centuries with global temperatures significantly higher even than today.

They also confirm claims that a Little Ice Age set in around 1300, during which the world cooled dramatically. Since 1900, the world has begun to warm up again - but has still to reach the balmy temperatures of the Middle Ages.

The timing of the end of the Little Ice Age is especially significant, as it implies that the records used by climate scientists date from a time when the Earth was relatively cold, thereby exaggerating the significance of today's temperature rise.

According to the researchers, the evidence confirms suspicions that today's "unprecedented" temperatures are simply the result of examining temperature change over too short a period of time.

The study, about to be published in the journal Energy and Environment, has been welcomed by sceptics of global warming, who say it puts the claims of environmentalists in proper context. Until now, suggestions that the Middle Ages were as warm as the 21st century had been largely anecdotal and were often challenged by believers in man-made global warming.

Dr Philip Stott, the professor emeritus of bio-geography at the University of London, told The Telegraph: "What has been forgotten in all the discussion about global warming is a proper sense of history."

According to Prof Stott, the evidence also undermines doom-laden predictions about the effect of higher global temperatures. "During the Medieval Warm Period, the world was warmer even than today, and history shows that it was a wonderful period of plenty for everyone."

In contrast, said Prof Stott, severe famines and economic collapse followed the onset of the Little Ice Age around 1300. He said: "When the temperature started to drop, harvests failed and England's vine industry died. It makes one wonder why there is so much fear of warmth."

The United Nation's Intergovernmental Panel on Climate Change (IPCC), the official voice of global warming research, has conceded the possibility that today's "record-breaking" temperatures may be at least partly caused by the Earth recovering from a relatively cold period in recent history. While the evidence for entirely natural changes in the Earth's temperature continues to grow, its causes still remain mysterious.

Dr Simon Brown, the climate extremes research manager at the Meteorological Office at Bracknell, said that the present consensus among scientists on the IPCC was that the Medieval Warm Period could not be used to judge the significance of existing warming.

Dr Brown said: "The conclusion that 20th century warming is not unusual relies on the assertion that the Medieval Warm Period was a global phenomenon. This is not the conclusion of IPCC."

He added that there were also doubts about the reliability of temperature proxies such as tree rings: "They are not able to capture the recent warming of the last 50 years," he said.

Other Telegraph Climate Stories:4 April 2003: English strawberries on shelves in record time 20 February 2003: Britain faces drier summers and flooding 4 February 2003: Climate change plagues hay fever sufferers 30 November 2002: Growth in flights will wreck climate, says commission


TOPICS: Announcements; Canada; Culture/Society; Germany; Government; Japan; News/Current Events; Russia; Technical; Unclassified; United Kingdom
KEYWORDS: globalwarming; godsgravesglyphs; hrvard; science
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Memo to Al Gore and the Green Party
1 posted on 04/06/2003 11:04:52 AM PDT by Francohio
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To: Francohio
Got a direct link?
2 posted on 04/06/2003 11:08:43 AM PDT by Sir Gawain
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To: Francohio
Am I mistaken in recalling that the Vikings settled Greenland when it was relatively "green", and disappeared after the "little ice age" set in, due apparently to isolation, disease, and possibly eskimo attack?
3 posted on 04/06/2003 11:10:37 AM PDT by marron
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To: Francohio
bump
4 posted on 04/06/2003 11:11:51 AM PDT by RippleFire
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To: Sir Gawain
http://www.portal.telegraph.co.uk/news/main.jhtml?xml=/news/2003/04/06/nclim06.xml&sSheet=/news/2003/04/06/ixhome.html
5 posted on 04/06/2003 11:13:18 AM PDT by Francohio
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To: marron
On the money, marron. Nat Geo Special.
6 posted on 04/06/2003 11:14:19 AM PDT by Francohio
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To: marron
Available hard data supports just what you said.

Looks like it's going to be one of those "be nice to your liberalism impaired friends" times. Life is only going to be evermore stressful for them.
7 posted on 04/06/2003 11:31:43 AM PDT by GladesGuru (In a society predicated upon liberty, it is essential to examine principles - -)
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To: Francohio
Interesting article. I'm under the impression that the information is more or less common knowledge, but I guess that doesn't stop the global warming grant seekers.
8 posted on 04/06/2003 11:32:18 AM PDT by Sam Cree (liberals are the axis of evil)
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To: Francohio
A professor of mine summed up the greenies position as someone that's never been the beech taking tide measures every hour in the morning, and predicting that in two weeks the world will be underwater. When you're dealing with data from the last 100 years of the earth's billion year life span you shouldn't go out making predictions.
9 posted on 04/06/2003 11:51:34 AM PDT by lelio
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To: Francohio
Global Warming is the biggest crock prepetuated on the World! And we can thank dear old Maggie Thatcher for it!
10 posted on 04/06/2003 11:53:48 AM PDT by Bommer (Tom Dasshole is a Domestic Enemy!!!)
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To: blam
ping
11 posted on 04/06/2003 11:56:46 AM PDT by the-ironically-named-proverbs2
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To: marron
Am I mistaken in recalling that the Vikings settled Greenland when it was relatively "green", and disappeared after the "little ice age" set in, due apparently to isolation, disease, and possibly eskimo attack?

Your reference to eskimo attack implies that the Vikings were entitled to displace the local population (if any) and, reflects a strictly Viking/European view. A more balanced view would be "eskimos repelling an invader".

12 posted on 04/06/2003 11:58:29 AM PDT by staytrue
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To: GladesGuru
Eleanor of Acquitaine had vinyards in England.
13 posted on 04/06/2003 12:00:21 PM PDT by Black Agnes
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To: staytrue
It must've been miserable for the nuns--Europe under a hot spell and they had to wear those headdresses and robes.
14 posted on 04/06/2003 12:01:20 PM PDT by Ciexyz
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To: marron
Absolutely correct, but add starvation to your list of causes for the end of Viking settlement in Greenland.
15 posted on 04/06/2003 12:06:42 PM PDT by Campion
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To: marron
You are more or less correct...Greenland was a open invitation and the Vikings found the region to be fairly decent. The 'little ice age' really hindered exploration of the Atlantic...if it had not occurred...then America would be common knowledge by late 1300s.
16 posted on 04/06/2003 12:06:48 PM PDT by pepsionice
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To: Francohio
"...today's "unprecedented" temperatures are simply the result of examining temperature change over too short a period of time."

This is the point I've been trying to make about this for a while, myself. I mean, tree-rings and all are very nice, but how many 500 year old trees are there, in Europe, especially. And you have to cut the tree down to study its rings, no? I mean, really, when was the thermometer invented, anyway? When did we start keeping regular records of weather, accurate or not? Were there monks who kepts logs, even without measuring devices, "it's hot today, it's cold today, it snowed today, etc."? My understanding is that weather "records" go back about 125 years at this point. I'm happy to be enlightened by any knowledgable freepers out there.

17 posted on 04/06/2003 12:06:58 PM PDT by jocon307 (The weather, everyone talks about it, no one does anything about it!)
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To: jocon307
Monks were too busy making cheese ,wine and beer....then working on how to overcome odors.
18 posted on 04/06/2003 12:16:23 PM PDT by Light Speed
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To: Francohio
Re: Global Warming: Medieval Era Hotter than Today

Which explains:


"One more 'Are we there yet?'
and I'm going medieval on your a$$!"

Want a break from war news? Go to the Stark Trek Freeper Post or the New Stark Trek Website for a laugh or two. Then come back refreshed and loaded for bear!

19 posted on 04/06/2003 12:16:45 PM PDT by sonofatpatcher2 (Love & a .45-- What more could you want, campers? };^)
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To: Francohio; Ernest_at_the_Beach; Grampa Dave
Memo to Al Gore and the Green Party

I'm quite certain the warming during this period was due to the heavy reliance on 4 Leg drive vehicles, commonly referred to then as HUV's (horse utility vehicles).

In addition the extreme use of wood burning for heat and cooking could have easily been avoided and saved the planet. Then again, its still here.....go figure.

20 posted on 04/06/2003 12:27:47 PM PDT by BOBTHENAILER (Just like Black September. One by one, we're gonna get 'em.)
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To: jocon307
I mean, tree-rings and all are very nice, but how many 500 year old trees are there, in Europe, especially. And you have to cut the tree down to study its rings, no?

You can examine the grain of wood in old buildings and ships. I saw a TV show where the matched up the average ring size in various wood samples in a region. For example, they would have one piece of wood which covered 1640-1670, which they matched with wood from a different tree which grew from 1660-1700, etc., to get a multi-century string of samples.

21 posted on 04/06/2003 12:46:29 PM PDT by KarlInOhio (France: The whore for Babylon)
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To: Francohio
"He added that there were also doubts about the reliability of temperature proxies such as tree rings: "They are not able to capture the recent warming of the last 50 years," he said."

Could it possibly be that the reason they don't is that there really hasn't been any warming in the last fifty years?
22 posted on 04/06/2003 12:54:30 PM PDT by chaosagent
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To: BOBTHENAILER
LOL!
23 posted on 04/06/2003 1:14:57 PM PDT by Ernest_at_the_Beach (Where is Saddam?)
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To: jocon307; All
Back in 1966 my 9th grade Science teacher talked about the interstellar dust clouds, and one (of many) "moving" through our solar system would reduce the sunlight hitting the Earth would cause a "little ice age". Has there been any work on that theory since then?
24 posted on 04/06/2003 1:29:44 PM PDT by PA_hayseed
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To: Francohio
Claims that man-made pollution is causing "unprecedented" global warming have been seriously undermined by new research which shows that the Earth was warmer during the Middle Ages.

See Thomas Gale Moore's Global Warming: a Boon for Humans and Other Animals and other papers on the site at the Hoover Institution for more on this. The Medieval Climate Optimum didn't occur simultaneously throughout the world. As it occurred, civilization flourished from Europe to China.
25 posted on 04/06/2003 1:32:21 PM PDT by aruanan
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To: BOBTHENAILER; Francohio; Ernest_at_the_Beach; Grampa Dave
I must warn you guys: such jocularity over such a serious topic, which will seriously impact such minorities as women, children and others, could have each and every one of you thrown bodily from the Green Party and/or a Greenpeace Meeting.

As you know, according to Blix (sounds like one of Santa's Lesser-Known reindeer,) Global Warming is a far greater threat to us and Sweden than Saddam Hussein. O, the Humanity!

Global Warming must be real. Why else would our all-knowing government settle so many Somalis in Maine? After all, Somalia averages 110 in the shade. Maine must be warming up quicker than I thought.

26 posted on 04/06/2003 1:36:10 PM PDT by Kenny Bunk
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To: All
I have known this for a long time.

This is hardly a new revelation, though this article tries to make it sound like it.
27 posted on 04/06/2003 1:42:49 PM PDT by rwfromkansas (God Reigns!)
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To: Francohio
Claims that man-made pollution is causing "unprecedented" global warming have been seriously undermined by new research which shows that the Earth was warmer during the Middle Ages.

This is not new research!!! After about a helf dozen paragraphs on the global warming crap, the reader is finally told that this new research is ...

[a] review of more than 240 scientific studies has shown that today's temperatures are neither the warmest over the past millennium, nor are they producing the most extreme weather - in stark contrast to the claims of the environmentalists.

28 posted on 04/06/2003 2:07:27 PM PDT by KayEyeDoubleDee (const vector<tags>& theTags)
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To: KayEyeDoubleDee
Hey, itwasnewtame!
29 posted on 04/06/2003 2:20:04 PM PDT by Francohio
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To: Francohio
Middle Ages Were Warmer Than Today, say Scientists
30 posted on 04/06/2003 2:26:18 PM PDT by blam
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To: staytrue
Your reference to eskimo attack implies that the Vikings were entitled to displace the local population (if any) and, reflects a strictly Viking/European view. A more balanced view would be "eskimos repelling an invader".

The word attack implies no such thing, although it may suggest who was the aggressor. In addition, your assertion that the attack was an attempt at "repelling an invader" assumes facts you have not presented, and quite frankly, facts you could not have in your possession. Therefore, you're statement is not a "balanced view", but rather a one sided interpretation based on non existent facts and invalid assumptions.

31 posted on 04/06/2003 2:48:03 PM PDT by Bob J
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To: Bommer
Global Warming is the biggest crock prepetuated on the World! And we can thank dear old Maggie Thatcher for it!

No. Dr. Wallace Broecker started it with his paper:"Climate Change: Are We on the Brink of a Pronounced Global Warming?" published in Science Magazine in 1975. Also known as Broecker's Warning.

32 posted on 04/06/2003 3:35:09 PM PDT by PeaceBeWithYou (De Oppresso Liber!)
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To: Francohio
Claims that man-made pollution is causing "unprecedented" global warming have been seriously undermined by new research which shows that the Earth was warmer during the Middle Ages.

Its f***ing April and there is snow on the ground here. We really need to increase greenhouse gas production in this country.

33 posted on 04/06/2003 3:35:45 PM PDT by weikel (Ever notice how the Paleos and the Dem/Commies have the same talking points on the Iraq war)
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To: Francohio
There you go...
Screwing up the pinko-commie-green-socialist massive-government-expansion agenda...by quoting
facts.

The inuendo, ignorance and outright lies of the
howling left-wing mob have been good enough for
them so far.

Why confuse the morally-bankrupt weak-minded
loonies with facts?
34 posted on 04/06/2003 4:48:53 PM PDT by TheJollyRoger (After we re-elect George W. Bush...lets impeach Hitlery!)
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To: TheJollyRoger
Yeah, all that work put into a perfectly good excuse for controlling everyone, let alone concocting a specious theory is now down the tubes!
The greenies are going to attempt to discredit this immediately.
Never mind that they've relied on the same data themselves and say it's accurate...
35 posted on 04/06/2003 5:23:09 PM PDT by Darksheare (Nox aeternus en pax.)
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To: TheJollyRoger
Dr Simon Brown, the climate extremes research manager at the Meteorological Office at Bracknell, said that the present consensus among scientists on the IPCC was that the Medieval Warm Period could not be used to judge the significance of existing warming.

Dr Brown said: "The conclusion that 20th century warming is not unusual relies on the assertion that the Medieval Warm Period was a global phenomenon. This is not the conclusion of IPCC."

He added that there were also doubts about the reliability of temperature proxies such as tree rings: "They are not able to capture the recent warming of the last 50 years," he said.

He concluded his comments by remarking, "besides, if these people turn out to be right, I'm out of a job. Uhh, that tape recorder isn't still running, is it?"

36 posted on 04/06/2003 5:29:22 PM PDT by mvpel (Michael Pelletier)
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To: staytrue; Francohio
Your reference to eskimo attack implies that the Vikings were entitled to displace the local population (if any) and, reflects a strictly Viking/European view. A more balanced view would be "eskimos repelling an invader".

Whatever.

Actually, I did not pass judgement on the merits of an Eskimo attack, since I was not there, and there are no records to describe any conflict between them. But if memory serves, the Eskimos were not present when the Vikings arrived, but migrated in from the north later. If I am mistaken, I invite correction. (Thats what I love about this website; mess up and someone is bound to set you straight).

Studies of Eskimo linguistics suggest that they spread from Siberia, across the Americas, to Greenland, and then later began a reverse migration westward, back across the Americas, and ultimately back to Siberia. The Siberian eskimos of today are direct descendents of Alaskan eskimos that migrated there in the twenties. Again, if memory serves.

Eskimo culture fascinates me.

37 posted on 04/06/2003 6:51:39 PM PDT by marron
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To: marron
Okay, I don't want to get into the horrible war between the eskimos and the vikings, but on the subject of global warming...
Does anyone remember this oldie but goodie? Sea level rise You know the story, as the earth warms the ice caps...bla bla bla.
More evidence as far as I'm concerned that the debate about the existance of global warming is political and not scientific. And that no scientific evidence to the contrary, (tree rings, sea level) is allowed.
38 posted on 04/06/2003 9:49:19 PM PDT by WhoisAlanGreenspan?
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To: Francohio
None of this matters one iota. The environmentalist movement is not a "scientific" movement but a political one. They have been manufacturing or skewing studies to promote their agenda which is the destruction of capitalism and it's associated democracy. Their entire objective is the promotion of socialism on a global scale. They failed in their promotion of "scientific" socialism. Now they are promoting another "scientific" approach towards the same end.

Never mind that socialism is a failed system. Socialists and communists aren't interested in progress, they are interested in control.

39 posted on 04/06/2003 10:03:44 PM PDT by Cacique
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To: Francohio
I didn't know there were Republicans to blame for this back then!
40 posted on 04/06/2003 10:33:32 PM PDT by technochick99 (Self defense is a basic human right. http://www.2ASisters.org)
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To: Francohio
Areas throughout the northeaast are expected to get 6-8 inches of snow today.
41 posted on 04/07/2003 7:40:40 AM PDT by jpl
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To: Francohio
IT looks like Al Gore was right. Bovine feces must be regulated. Look what the deregulation of bovine feces did to the Middle Ages.
42 posted on 04/07/2003 7:48:31 AM PDT by NYCRebublican
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To: marron
.....Thats what I love about this website.....

As a pretty fair student of world history, I must confess my failing and debt to FR for enlightening me on the previously unknown notion that there was even the possibility of war between Vikings and Eskimos.

We live, We learn....

43 posted on 04/07/2003 7:56:19 AM PDT by bert (Don't Panic !)
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To: marron
Am I mistaken in recalling that the Vikings settled Greenland when it was relatively "green", and disappeared after the "little ice age" set in, due apparently to isolation, disease, and possibly eskimo attack?

I believe that during the "Medieaval Optimum" (period of warming) Greenland was warm enough to raise cattle there; after 1300 or so, the place was not an economically viable place to live.

es
44 posted on 04/07/2003 9:57:46 AM PDT by eddiespaghetti (Cok yemek, bujuk gobek)
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To: bert
I don't honestly know if there was ever any war between the vikings and the eskimos. No one was there to record the final days of the Vikings on Greenland. Some people have theorized that there could have been some kind of conflict between them toward the end, but I'm not sure what kind of evidence exists to support that. Its just a theory.

Really, it seems to have been malnutrition which led to disease which brought about the end of the Vikings there. The malnutrition presumably was caused by bad harvests, which presumably was caused by the worsening climate (the "little ice age").

The whole subject of eskimo attacks is tangential, and I'm not sure how we got off on that. The eskimos seem not to have been there when the Scandinavians arrived, although they seem to have had some contact with them later. I think everything else is just conjecture.

The point is, the climate was warmer when Greenland was settled, and they were able to live by traditional agriculture. Then the climate got worse over time, traditional agriculture no longer could support them, and the settlements there died out.

Thus, it seems, global temperatures vary over a period of several centuries. If global warming progressed to a point such that traditional agriculture could again be undertaken in Greenland, it would not necessarily portend the end of life on earth as we know it.


http://www.discover.com/mar_00/featvanished.html
Vanished Vikings
45 posted on 04/07/2003 10:14:43 AM PDT by marron
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To: Francohio
Last year, scientists working for the UK Climate Impacts Programme said that global temperatures were "the hottest since records began" and added: "We are pretty sure that climate change due to human activity is here and it's accelerating."

It has been well known for the longest time that Greenland was a whole lot warmer during the Middle ages.  The reason it was basically abandoned was due to the onslaught of the little ice age.
46 posted on 04/07/2003 10:18:47 AM PDT by Frumious Bandersnatch
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To: Cyrano
ping #5 for direct link to article.
47 posted on 04/07/2003 11:09:50 AM PDT by Terriergal (..in Your great compassion You gave them deliverers, who rescued them from the hand of their enemies)
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To: TheJollyRoger
Sorry, I got carried away. Won't happen again. I suppose this means I can't wear my AL Gore T-shirt to antiwar rallies?
48 posted on 04/07/2003 11:13:28 AM PDT by Francohio
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Comment #49 Removed by Moderator

To: PeaceBeWithYou
Your right, but it was Thatcher that got it to take off into the mainstream!
50 posted on 04/07/2003 6:26:00 PM PDT by Bommer (Tom Dasshole is a Domestic Enemy!!!)
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