The Bear Necessities

If you would be wealthy, think of saving as well as getting.
Benjamin Franklin

When I was younger, my parents would read to me before I went to bed.  I would hear tales of adventure and science from Tom Swift, Jr. and tales of mystery from the Hardy Boys, and the fantastical from The Hobbit.  They would also read the Berenstain Bears to me.  If you’re unfamiliar with this series, it’s about a family of bears that face situations that are likely to be faced by children and parents.  The Bear family consists of Papa Bear, Mama Bear, Brother Bear, Sister Bear, and, since 2000, Honey Bear.  There have been more than 260 books in the series.  In the books, Brother and Sister bear learn many valuable lessons, like what happens when you watch too much TV (The Berenstain Bears and Too Much TV), eat to much junk food (The Berenstain Bears and Too Much Junkfood) (hurmmm American public), or about earning and saving money (Wall Street)… I mean Trouble with Money.

The one that made a lasting impression on me was The Messy Room (da, da, daa).  In that book, Brother and Sister have a messy room and can never find anything (they even forget that they have some things) and their parents come up with an idea for storage.  Clearly labeled boxes stacked in the closet.  And then their room is clean (I’m still working on it myself, is it messy if I know what’s in all the piles?).

The current (that pun again) electrical infrastructure is like that messy room.

Wind Energy
Creative Commons License photo credit: l.bailey_beverley

The current electrical grid operates on a “use or lose” bias.  Meaning that only the amount of electricity needed at any given moment is on the grid.  If an energy source, like a wind turbine in West, Texas produces more electricity than the grid can use, it is bled off as waste.  If the amount of electricity needed increases, then short start up generators go online and once the demand is over they shut back down.  That strikes me as a very dumb grid.

One of the large hurtles in making a smarter grid is electrical storage.  We are all used to some forms of electrical storage.  We have alkaline batteries lying about our houses (except AA, I can never find any, but I’m sure they’re just over there…).  These work by producing electricity through the reaction of zinc and magnesium dioxide. They make up 80% of the batteries in the United States.  People have also gotten familiar with the lithium ion batteries which are found in most mp3 players and some phones. Lithium ion batteries are rechargeable, but through many recharges slowly loose the ability to hold a charge.  Lithium sodium batteries are in the works that can hold more energy and be a little less expensive.  One way to get batteries for your home is to get the old batteries from your hybrid car.

Chemical batteries are not the only way to store electricity.

Engine & Flywheel
Creative Commons License photo credit: Howard Dickins

Another way is to store the energy as compressed air.  The excess electricity is used to compress air, and when the electricity is needed the air is let out and turns a turbine.  Compressed air has been used for energy since the 1870s in Paris, London, and other cities. Another way to store electricity is the use of fly wheels.  The excess electricity is used to power up a rotor in a spinning motion.  When electricity is needed, the movement of the rotor is converted back into electricity. The new Gerald Ford class super aircraft carriers will make use of flywheels to help launch planes.  One of the main technical concerns is friction.  Too much friction and too much energy is lost. One of the most efficient ways to store up electrical power on the large scale is pumped water. The excess electricity is used to pump water up in a holding chamber or reservoir.  Then when electricity is needed, the water flows back down.

Electrical storage is also important for renewables.  Solar power can be unreliable.  Because of the rotation of the earth, solar power can be reliably unreliable.  Solar power can only be gathered when the sun is out.  Most of the time the sun is out, I’m at work.  There are usually only a few days a week when I get to see the sun.  Therefore, most of my electrical needs happen when solar power is not an option.  If I had a way to store it while I was at work, then I would use it when I got home. The same is true for wind.  Despite the United States being full of hot air, wind does not always blow.  Wind generated electricity can sometimes be too much for the electrical grid.  If the excess were stored, it could be used when there’s no wind a blowin’.

Small scale electrical storage would also help small scale renewables.

If I have a small scale solar panel, a small wind turbine, and a small water pump all tied up with some sort of electrical storage, I can take the electricity I gather in and only use it when I need it.  That way if the sun shines, the wind blows, or the rain falls while I’m away, I can come back and have Mother Nature power my computer.

August Flickr Photo of the Month: Terra Cotta Warriors!

Houston Cougars

There are some amazing photographers that wander the halls of HMNS – as well as the areas surrounding the Museum in Hermann Park. When we’re lucky, they share what they capture in our HMNS Flickr pool. Each month, we highlight one of these photos here on the blog.

This month, we’re featuring a photo from Arie Moghaddam, known as Houston Cougars on Flickr, who is a regular attendee of the Museum’s Flickr meetups. This photo is from the meetup we held in our Summer 2009 exhibition, Terra Cotta Warriors: Guardians of China’s First Emperor.

Why would we feature an image that’s celebrating it’s 2nd birthday? First: we’re thinking a lot about the Terra Cotta Warriors lately – since we’ve just announced a new exhibit featuring these wonders of the world!

Warriors, Tombs and Temples opens April 1, 2012!

The upcoming exhibit  includes 200 incredibly preserved ancient works of art featuring newly-discovered artifacts unearthed from imperial, royal and elite tombs and from beneath Buddhist monasteries in and around the capital cities of three great dynasties – as well as four of the famous life-size Terra Cotta Warriors!

And, second: it’s a great image with a unique perspective on the original exhibit. Arie shared a few words about what inspired it:

As for what inspired me to take the picture (aside from you being nice enough to invite us), of all the pictures I took I think this one best captures the essence of the exhibit since it combines the statue, cross bow, and armor in a logical order which any emperor would be pleased to have in his necropolis.

Inspired? Most of the Museum’s permanent galleries are open for photography, and we’d love for you to share your shots with us on Flickr, Facebook or Twitter. Check out the HMNS photo policy for guidelines.

Terra Cotta Warriors was a temporary exhibit, and photography was restricted outside of special Flickr meetup opportunities. Follow our posts in the HMNS Flickr pool for announcements about upcoming events.

The Scythians [Ancient Ukraine]

Traditionally we can divide mankind’s past into two parts: before and after writing, or, prehistory and history. There is, however, a third period, which characterizes the transition from one to the other. Occasionally we may know of cultures through texts written by a third party. Such is the case for the Scythians.

In this blog, I will review our sources for the study of Scythian culture. These include archaeology and text materials. We will start our acquaintance with the Scythians through the results of dirt archaeology. Toward the end, the reader will see the remarkable accuracy – keeping in mind their antiquity – of Greek writings on Scythian culture. Throughout the blog, I will refer to objects on display at our current exhibit, ДРЕВНЯ УКРАЇНА (Ancient Ukraine) – Golden Treasures and Lost Civilizations, to illustrate these points.

Archaeology has been our main source of information on nomadic people in general.

The Scythians in particular appear to have roamed across an expansive part of Asia into parts of Eastern Europe. In the summer of 2006, archaeologists discovered the mummified remains of a Scythian individual in Mongolia. Until then, the conventional wisdom among archaeologists was that Scythians lived and roamed in an area west of the Altai Mountains.

This discovery proved them wrong.

Compare these two maps, each representing the areas where Scythians were once thought to have lived, and consider how far we have come since Herodotus first wrote about the Scythians.

World map - Herodotus
Modern rendering of Herodotus’ worldview, with a reference to where the Scythians once lived.
Modern map of the Scythian realm
Modern map of the Scythian realm.

Over the last two and a half centuries Scythian artifacts primarily come from burial mounds, or kurhans.

In some cases, looters ransacked the tombs they knew were inside these mounds, leaving only few discarded objects for archaeologists to find. On happier occasions, archaeologists were able to investigate kurhans that had not been damaged yet. Hundreds of these kurhans have now been excavated and the discoveries published (Piotrovsky, 1974: 26-31).

With a sample this size, it has become easy for archaeologists to identify patterns. The size of the burial mounds reflects the importance of the individuals buried inside. The presence of servants buried alongside with the deceased, as well as the richness of the grave goods all supports this notion. In anthropological terms, we are looking at a stratified society, a society composed of multiple social layers, with unequal access to resources.  Horses, so important to nomadic people like the Scythians, are widely represented in art. We also find countless horse skeletons, buried alongside their master in the kurhan.

The Scythians roamed far and wide and their interactions with other cultures are also reflected in their grave goods. Greek cities along the Black Sea coast of Ukraine traded with the Scythians. A ceramic vessel on display in our current exhibit is of Greek design and is decorated with an image of an octopus.

Greek Amphora
Greek amphora with octopus design on temporary
display at the Houston Museum of Natural Science.
(Image courtesy of the Foundationfor International Arts and Education,
Bethesda, Maryland, the Government of Ukraine and the Museum
of Cultural Heritage PLATAR.)

It appears that wine and seafood was known (and appreciated) by more than just the Greek population along the Black Sea.

Ancient Greek Colonies of the Northern Black Sea
Greek cities, such as Olbia, located along the shores of the Black Sea, traded with the Scythians.

The Scythians and Persians also knew of each other.

This awareness of the other resulted in trade, exchange of ideas and art forms, as well as outright hostilities and protracted warfare. Among the more peaceful expressions of this back and forth between these two cultures, one could point to Persian-inspired drinking horns, or rhytons, two of which are on display at the museum.

Rhyton
A Persian-inspired gold drinking cup on display at the Houston Museum of
Natural Science. (Images courtesy of the Foundation for International
Arts and Education, Bethesda, Maryland, the Government of
Ukraine and the Museum of Cultural Heritage PLATAR).

We know of very few Scythian permanent settlements.

There is Bilsk, (also known as Bel’sk), a large fortified settlement on the banks of the Vorskla River. Earthen Ramparts some 33 km (or 20 miles) in length enclose an area of 4,000 hectares (almost 10,000 acres). Within this fortified area, there were two additional, smaller fortified sections with an area of 72 and 62 hectares. Modern reconstructions show it with palisades.

Another fortified city, tentatively identified by some as the Scythian capital, is Kamenka (Rolle, 1980: 119). Kamenka occupied about 12 km2 (more than 4.5 square miles) with an area of 900 hectares (or more than 2,000 acres) with an acropolis and extensive metal works (Kristiansen, 1998: 279).

I outlined at the beginning of this blog that there are cultures which we know of courtesy of descriptions left by third party authors. We do not know of any Scythian authors, very likely because there may not have been any. Yet we do have lengthy and interesting descriptions compiled by a well known Greek historian and overall great storyteller, Herodotus.

Here is one of Herodotus’ passages on the Scythians:

The Euxine Sea, where Darius now went to war, has nations dwelling around it, with the one exception of the Scythians, more unpolished than those of any other region that we know of. For, setting aside Anacharsis and the Scythian people, there is not within this region a single nation which can be put forward as having any claims to wisdom, or which has produced a single person of any high repute. The Scythians indeed have in one respect, and that the very most important of all those that fall under man’s control, shown themselves wiser than any nation upon the face of the earth. Their customs otherwise are not such as I admire. The one thing of which I speak is the contrivance whereby they make it impossible for the enemy who invades them to escape destruction, while they themselves are entirely out of his reach, unless it pleases them to engage with him. Having neither cities nor forts, and carrying their dwellings with them wherever they go; accustomed, moreover, one and all of them, to shoot from horseback; and living not by husbandry but on their cattle, their wagons the only houses that they possess, how can they fail of being unconquerable, and unassailable even?

In describing this non-Greek culture, Herodotus resorts to a rather common Greek sentiment. He describes them as “barbarians,” elaborating that he cannot find many redeeming traits among Scythian culture. Herodotus scholars identify both areas of congruence between archaeology and Herodotus’ writings as well as areas where there is dissonance. For example, there is overlap between what Herodotus wrote about the kurhans and what archaeologists have subsequently unearthed. However, Herodotus appears misguided when it comes to where he locates the kurhans, limiting them to a much smaller area than where they have been found and investigated by archaeologists (Hartog 1988:3 – 11).

These are sentiments to keep in mind as you walk through the exhibit.

What is left of this culture is still largely seen through the filter of grave goods, with very little in terms of text material and settlement archaeology to provide context. Imagine a future historian writing a book about the first 250 years of US history limited to information gathered at Civil War cemeteries. There is a lot more to the picture. Undoubtedly future archaeological projects will fill in these blanks. In the meantime, do come see the exhibit. After September 5, you will have missed the boat.

References:
Hartog, François
1988 The Mirror of Herodotus. The representation of the other in the writing of history. Translated by Janet Lloyd. university of California Press, Berkeley and Los Angeles
.

Kristiansen, Kristian
1998 Europe Before History. Cambridge University Press, Cambridge and New York
.

Piotrovsky, Boris, et al.
1974  “From the Lands of the Scythians: Ancient Treasures from the Museums of the U.S.S.R., 3000 B.C.–100 B.C.” The Metropolitan Museum of Art Bulletin, v. 32, no. 5
.

Rolle, Renate
1980 The World of the Scythians. Translated by F.G Walls from the German Die Welt der Skythen. University of California Press, Berkely and Los Angeles
.

Elixir – A History of Water and Humankind

Guest Blogger Brian Fagan, Ph.D., New York Times best-selling author of The Great Warming and Cro-Magnon comments on his career in archaeology and his interest in tracing ancient climate change, at his August 8 lecture at HMNS. Fagan also talks about his new book, Elixir.

I became an archaeologist almost by accident while at Cambridge University in England. By chance, I got a job working in a museum in Zambia, then Northern Rhodesia, and ended up spending seven years doing archaeological research in East and Central Africa. I was excavating ancient farming villages and helping write African history, which gave me a passion for sharing the past with the public.

Since coming to the United States in 1966, I’ve specialized in writing about archaeology for general audiences. This morphed into a long-term interest in ancient climate change and how it affected humanity. This has culminated in three books: The Great Warming, which describes climate changes 1,000 years ago, Cro-Magnon, about hunters in the Late Ice over 20,000 years ago, and my latest book, Elixir, a history of humans and water.

Elixir took me on a fascinating journey through 10,000 years of history—to Egypt, India, and Mesopotamia, to Greece, Rome, and Medieval Europe, the world of the ancient Maya and the Arizona desert. I learned all about gravity, about brilliant Islamic water engineers, and the Inca of the Andes, who invested in water for eternity. Are these long forgotten efforts at water management relevant to our world. Most certainly they are and our journey ends in today’s world, where we face a quiet crisis of ever-scarcer water supplies.

Dr. Fagan will give a lecture entitled “Elixir: A History of Water and Humankind” on Monday, August 8 at 7 p.m. at the Houston Museum of Natural Science. Following the lecture he will be signing copies of his new book Elixir: A History of Water and Humankind and Cro-Magnon. Book signing by Brazos Book Store at HMNS.

Click here to purchase tickets.
Click here to read an author interview about Elixir.
More on Dr. Fagan
Check out Dr. Fagan’s appearence on the Daily Show, where he discusses  The Great Warming.

About Dr. Fagan
Brian Fagan was born in England and studied archaeology at Pembroke College, Cambridge. He was Keeper of Prehistory at the Livingstone Museum, Zambia, from 1959-1965. During six years in Zambia and one in East Africa, he was deeply involved in fieldwork on multidisciplinary African history and in monuments conservation. He came to the United States in 1966 and was Professor of Anthropology at the University of California, Santa Barbara, from 1967 to 2004, when he became Emeritus.

Since coming to Santa Barbara, Brian has specialized in communicating archaeology to general audiences through lecturing, writing, and other media. He is regarded as one of the world’s leading archaeological and historical writers and is a widely respected popular lecturer about the past. His many books include three volumes for the National Geographic Society, including the bestselling Adventure of Archaeology. Other works include The Rape of the Nile, a classic history of archaeologists and tourists along the Nile, and four books on ancient climate change and human societies, Floods, Famines, and Emperors (on El Niños), The Little Ice Age, and The Long Summer, an account of warming and humanity since the Great Ice Age. His most recent climatic work describes the Medieval Warm Period: The Great Warming: Climate Change and the Rise and Fall of Civilizations. His other books include Chaco Canyon: Archaeologists Explore the Lives of an Ancient Society and Fish on Friday: Feasting, Fasting, and the Discovery of the New World and Cro-Magnon: How the Ice Age gave birth to the First Modern Humans. His recently published Elixir: A History of Water and Humankind extends his climatic research to the most vital of all resources for humanity.

Brian has been sailing since he was eight years old and learned how to cruise in the English Channel and North Sea. He has sailed thousands of miles in European waters, across the Atlantic, and in the Pacific. He is author of the Cruising Guide to Central and Southern California, which has been a widely used set of sailing directions since 1979. An ardent bicyclist, he lives in Santa Barbara with his wife Lesley and daughter Ana.