Tuesday, February 10, 2009

Ice Age Climate Map

That earlier post on human migration got me curious about the climate of the ice age. What sort of a world were our ancestors encountering as they spread inexorably around the world? Earth was in a glacial period for most of the time during which the expansion of our species occurred; the current interglacial period we all know and love didn't set in until after humans had colonized every continent (every decent continent, at least - sorry, Antarctica). So what was the world like for those prehistoric peregrinators?

Ask Wikipedia, and ye shall receive:

(You'll have to click on the map or follow the link to be able to read the legend.) This is a standard-issue vegetation map of the sort that always show up in the first section of world atlases, but it shows the world as it was ca. 18,000 years ago. And things were shockingly different. For instance:

-That purple in the eastern US indicates taiga, the coniferous forests which today are found right at the limit of the Arctic tree line in northern Canada. Apparently the Mississippi Delta of 18,000 years ago resembled the Yukon of today.

-Florida was a semi-arid temperate woodland, and the Atlantic coast of the US was boreal forest. Anything north of New York City and Chicago was under ice altogether.

-Much of Europe was under ice as well, and steppe-tundra extended all the way down to the Mediterranean coast. Tundra also had a foothold in the interior of the Iberian Peninsula.

-Interestingly, there were tropical forests and grasslands in many of the same areas as there are today. But the temperate regions really get pinched; it seems that between the subtropical deserts (also in most of the same regions as today) and the ice and tundra of the higher latitudes, there just wasn't much room for the expansive temperate forests which have more recently been characteristic of North America and Eurasia, especially. It seems that the world of 18,000 years ago just had a lot fewer trees.

-Australia? 'Bout the same, maybe a little chillier. The Southern Hemisphere in general, in fact, seems to have been less affected by the last period of glaciation.

Given all this, you can well imagine why humans spread first along the coast of the Indian Ocean, all the way to Australia: pretty much everything north of there was barren, windswept, and cold. It was the North Dakotafication of the world. In fact, as those first bands of humans finally left the amniotic comforts of southern Asia and Africa and soldiered into the frozen lands to the north, an interesting question to ask them would have been: why?


crazyloko said...

cell phonesThis phenomenom is typified by mobile phonethe rise ofbusiness. Incredible range of products available with China Wholesale “Low Price and High Quality” not only reaches directly to their target clients worldwide but also ensures that cheap cell phones wholesale from China means margins you cannot find elsewhere and China Wholesale will skyroket your profits.

tn requin said...

sleeping bag
travel luggage
car gps
car parts
GPS navigation
portable GPS
lcd tv
flat tv
digital picture frames
unlocked cell phones
wedding dresses
wedding jewelry
chaussures mode
chaussures Femmes
women's shoes
round tablecloth
discount handbags
chaussures sport
chaussures pas cher
fashion bedding
id lanyard
creative gadgets
gift ideas
kids wall stickers
wall stickers
bath curtains
kitchen faucet
bathroom faucet

Rumah Sakit Mitra Kemayoran said...

thanks for sharing..

Warung Talaga - Tahu Yun Sen 1938
belajar internet marketing
Seminar Internet Marketing IMFreedom
Konsultan Internet Marketing Imfocus

Penis Enlargement Pills said...

I recently came across your blog and have been reading along. I think I will leave my first comment. I don’t know what to say except that I have enjoyed reading. Nice blog. I will keep visiting this blog very often.


We want to tell you how to enlarge penis a naturally with herbal supplements,without surgery and completely natural.

www.avila-3d.com said...

So, I don't really believe it may have success.

album foto said...

I think people fear idea management and innovation because there's a significant number of ideas that simply won't plan out.......Nice statement.....keep posting

asuransi pendidikan said...

this day I've been searching for information on various issues, this I found very good and I would like to congratulate you for your work.

design interior jakarta said...

I think that this post is one of the best that i have read in my life, congrats you did a great job,.

perusahaan security said...

the difference between the content spammers and most corporate innovators is that the smaller

jual wine said...

I'm writing to you because I just came across a business that I think has great potential. It lets you save money on almost everything. Make money from almost everything,

coklat valentine said...

If growth is important to a firm, and if growth is dependent on offering existing products and services to new customers

belajar internet marketing said...

innovation is very natural and happens in the "real world" as new plants and animals colonize new ecological niches.

kuliner bandung said...

I wonder how you got so good. This is really a fascinating blog, lots of stuff that I can get into. One thing I just want to say is that your Blog is so perfect

konsultan perusahaan said...

We generally think most specifically about the risk associated with a new product introduction

how to stay erect said...

I would be aware that as somebody who really doesn’t comment to blogs a lot (in actual fact, this may be my first put up), I don’t think the time period “lurker” is very flattering to a non-posting reader.

Denature Sip said...

GOOD Information, thankyou
cara cepat utk mengobati kemaluan mengeluarkan nanah
cara cepat untuk mengobati kemaluan mengeluarkan nanah
cara yang cepat mengobati kemaluan mengeluarkan nanah
cara yg cepat mengobati kemaluan mengeluarkan nanah
obat ampuh mengobati kemaluan mengeluarkan nanah
obat yang ampuh mengobati kemaluan mengeluarkan nanah
obat ampuh untuk mengobati kemaluan mengeluarkan nanah

gantungan kunci said...

good planning*****************

ganci murah said...

thanks in advance*****************

souvenir said...

thanks for this article ***********************************

Art Jokja said...

gantungan kunci akrilik print **************************gantungan kunci pilkada

Art Jokja said...

good planning************************

Art Jokja said...

Nice article************************

Art Jokja said...


Art Jokja said...

desain stempel****************************g'Luck

Art Jokja said...

stempel online****************************Cara Pesan Stempel Murah

Art Jokja said...

jasa stempel murah Warna**************************bikin stempel murah online

Art Jokja said...

jual obat ambeien murah**********aneka herbal

Art Jokja said...

penyempit vagina herbal*********************pesan penyempit vagina paket

Art Jokja said...

Obat perapat vagina************************

Art Jokja said...

obat wasir topambeien hilangobat keputihanobat penyempit vaginaobat kankerobat kutil kelaminobat sipilismasker payudaracream payudara montokherbal obat sehattestimoni herbalCara mengobati kanker serviks stadium 3obat perapat vaginaobat wasir tanpa operasi apa obatnya

Art Jokja said...

pesan gantungan kunci akrilik***********************produksi gantungan kunci akrilik resin

Art Jokja said...

bikin gantungan kunci akrilik ultah ***********************spesialis gantungan kunci akrilik obyek wisata

Anonymous said...

Cari Obat Kondiloma Apotik
Cari Obat Kondiloma
Obat Kondiloma di Apotik
Cari Obat alami Kondiloma di Apotik
Resep Obat Kondiloma
Obat Kondiloma di Apotik
Obat Kondiloma Apotik
Resep Obat ampuh Kondiloma di Apotik
Obat Kondiloma Kutil Kelamin
Obat Kondiloma Kutil Kelamin Apotik
Obat Kondiloma Kutil di Apotik
Obat Kondiloma Kutil Kelamin yang di Apotik
cara menghilangkan kutil yang di kemaluan pria
menghilangkan kutil di kemaluan pria
cara menghilangkan kutil yang ada di kemaluan pria
cara ampuh menghilangkan kutil di kemaluan pria
Cara Menghilangkan Kutil di Daerah Kelamin Pria
Menghilangkan Kutil di Daerah Kemaluan Pria
Cara Menghilangkan Kutil di Kemaluan Pria
Cara ampuh Menghilangkan Kutil di Daerah Kemaluan Pria
Menghilangkan Kutil di Kemaluan Pria
Cara Menghilangkan Kutil
Cara ampuh Menghilangkan Kutil di Sekitar Kemaluan Pria
Cara alami Menghilangkan Kutil di Sekitar Kemaluan Pria
Menghilangkan Kutil di Area Kemaluan Pria
Cara ampuh Menghilangkan Kutil di Area Kemaluan Pria
Cara Menghilangkan Kutil di Pria
Cara alami Menghilangkan Kutil di Area Kemaluan Pria
Obat untuk Wasir Ambeclear
Obat Ambeien Ambeclear
Obat Wasir Ambeien Ambeclear
Pengobatan Wasir atau Ambeien Ambeclear
Obat Wasir Manjur Ambeclear
Obat Ambeien Manjur Ambeclear
Obat Wasir atau Ambeien yang Manjur Ambeclear
Obat Wasir atau Ambeien Manjur dari Ambeclear