Archaeology is the study of the human past using material remains. These remains can be any objects that people created, modified, or used.
Portable remains are usually called artifacts. Artifacts include tools, clothing, and decorations. Non-portable remains, such as pyramids or post-holes, are called features.
Archaeologists use artifacts and features to learn how people lived in specific times and places. They want to know what these people’s daily lives were like, how they were governed, how they interacted with each other, and what they believed and valued.
Sometimes, artifacts and features provide the only clues about an ancient community or civilization. Prehistoric civilizations did not leave behind written records, so we cannot read about them.
Understanding why ancient cultures built the giant stone circles at Stonehenge, England, for instance, remains a challenge 5,000 years after the first monoliths were erected. Archaeologists studying Stonehenge do not have ancient manuscripts to tell them how cultures used the feature. They rely on the enormous stones themselves—how they are arranged and the way the site developed over time.
Most cultures with writing systems leave written records that archaeologists consult and study. Some of the most valuable written records are everyday items, such as shopping lists and tax forms. Latin, the language of ancient Rome, helps archaeologists understand artifacts and features discovered in parts of the Roman Empire. The use of Latin shows how far the empire’s influence extended, and the records themselves can tell archaeologists what foods were available in an area, how much they cost, and what buildings belonged to families or businesses.
Many ancient civilizations had complex writing systems that archaeologists and linguists are still working to decipher. The written system of the Mayan language, for instance, remained a mystery to scholars until the 20th century. The Maya were one of the most powerful pre-Columbian civilizations in North America, and their Central American temples and manuscripts are inscribed with a collection of squared glyphs, or symbols. A series of circles and lines represents numbers.
By deciphering the Mayan script, archaeologists were able to trace the ancestry of Mayan kings and chart the development of their calendar and agricultural seasons. Understanding the basics of the Mayan writing system helps archaeologists discover how Mayan culture functioned—how they were governed, how they traded with some neighbors and went to war with others, what they ate, and what gods they worshipped.
As archaeologists become more fluent in Mayan writing, they are making new discoveries about the culture every day. Today, some archaeologists work with linguists and poets to preserve the once-lost Mayan language.
History of Archaeology
People have dug up monuments and collected artifacts for thousands of years. Often, these people were not scholars, but looters and grave robbers looking to make money or build up their personal collections.
For instance, grave robbers have been plundering the magnificent tombs of Egypt since the time the Pyramids were built. Grave robbing was such a common crime in ancient Egypt that many tombs have hidden chambers where the family of the deceased would place treasures.
In Egypt in the mid-1800s, an Egyptian man searching for a lost goat stumbled across the tomb of Pharaoh Ramses I. (Many archaeologists doubt this story and say grave robbers, working as an organized group, routinely scouted and plundered many tombs in the area.) Ramses I ruled for a short time in the 1290s BCE. Besides the body of the pharaoh, the tomb held artifacts such as pottery, paintings, and sculpture. The man sold the mummies and artifacts from the tomb to anyone who would pay.
The mummy of Ramses I wound up in a museum in Niagara Falls, Ontario, Canada, where it remained until the museum closed in 1999. The Canadian museum sold the Egyptian collection to the Michael C. Carlos Museum in Atlanta, Georgia, United States, which confirmed the mummy’s royal status through the use of CT scanners, X-rays, radiocarbon dating, computer imaging, and other techniques. Ramses I was returned to Egypt in 2003.
One of the most well-known archaeological finds is the tomb of Pharaoh Tutankhamun, also known as King Tut. Unlike many other Egyptian tombs, grave robbers had never discovered King Tut. His resting place lay undisturbed for thousands of years, until it was discovered in 1922. In addition to mummies of Tutankhamun and his family, the tomb contained some 5,000 artifacts.
Many early archaeologists worked in the service of invading armies. When Gen. Napoleon Bonaparte of France successfully invaded Egypt in 1798, he brought artists, archaeologists, and historians to document the conquest. Napoleon’s troops took home hundreds of tons of Egyptian artifacts: columns, coffins, stone tablets, monumental statues. Today, these Egyptian antiquities take up entire floors of the Louvre Museum in Paris, France.
Some archaeologists of this time were wealthy adventurers, explorers, and merchants. Often, they were from Western European colonial powers from places different from where they excavated. These amateur archaeologists often had a sincere interest in the culture and artifacts they studied. However, their work is also tied to colonialism and cultural exploitation. They profited off cultures that was not their own, and took sacred objects and remains away from their historical and traditional sites.The so-called Elgin Marbles are an example of this controversy.
In 1801, Greece had been taken over by the Ottoman Empire. The British ambassador to the Ottoman Empire, Lord Elgin, received permission to remove half of the sculptures from the famous Acropolis of Athens, Greece. These marble sculptures were a part of buildings such as the Parthenon. Lord Elgin claimed he wanted to protect the valuable sculptures from damage caused by conflict between the Greeks and the Ottomans.
The government of Greece has been lobbying for the return of the Elgin Marbles ever since. Most Greeks view the sculptures as part of their cultural heritage. Greece has cut off diplomatic relations to the United Kingdom several times, demanding the return of the sculptures, which remain in the British Museum in London.
Eventually, archaeology evolved into a more systematic discipline. Scientists started using standard weights and measures and other formalized methods for recording and removing artifacts. They required detailed drawings and drafts of the entire dig site, as well as individual pieces. Archaeologists began to work with classicists, historians, and linguists to develop a unified picture of the past.
In the 20th century, archaeologists began to re-assess their impact on the cultures and environments where they dig. Today, in most countries, archaeological remains become the property of the country where they were found, regardless of who finds them. Egypt, for example, is scattered with archaeological sites sponsored by American universities. These teams must obtain permission from the Egyptian government to dig at the sites, and all artifacts become the property of Egypt.
Disciplines of Archaeology
Archaeology is based on the scientific method. Archaeologists ask questions and develop hypotheses. They use evidence to choose a dig site, then use scientific sampling techniques to select where on the site to dig. They observe, record, categorize, and interpret what they find. Then they share their results with other scientists and the public.
Underwater archaeologists study materials at the bottom of lakes, rivers, and oceans. Underwater archaeology encompasses any prehistoric and historic periods, and almost all sub-disciplines as archaeology. Artifacts and features are simply submerged.
Artifacts studied by underwater archaeologists could be the remains of a shipwreck. In 1985, National Geographic Explorer-in-Residence Dr. Robert Ballard helped locate the wreck of RMS Titanic, which sank in the North Atlantic Ocean in 1912, killing about 1,500 people. Ballard and other scientists used sonar to locate the wreck, which had been lost since the ocean liner sank. By exploring Titanic using remote-controlled cameras, Ballard and his crew discovered facts about the shipwreck (such as the fact the ship broke in two large pieces as it sank) as well as hundreds of artifacts, such as furniture, lighting fixtures, and children’s toys.
Underwater archaeology includes more than just shipwrecks, however. Sites include hunt camps on the continental shelf of the Gulf of Mexico, and portions of the ancient city of Alexandria, Egypt, submerged due to earthquakes and sea level rise.
This basic framework carries across many different disciplines, or areas of study, within archaeology.
Prehistoric and Historic Archaeology
There are two major
: prehistoric archaeology and
. Within these groups are subdisciplines, based on the time period studied, the
studied, or the types of
that did not develop writing.
from these societies may provide the only clues we have about their lives.
studying the Clovis people, for instance, have only arrowheads—called projectile points— and stone tools as
. The unique
were first discovered in Clovis, New Mexico, in the United States, and the culture was named after the town. So-called Clovis points establish the
as one of the first inhabitants of North America.
to about 13,000 years ago.
is the study of disease in
is also a
.) Paleopathologists may investigate the presence of
, what areas lacked certain
, and how different communities reacted to
. By studying the history of a
, paleopathologists may contribute to an understanding of the way modern
progress. Paleopathologists can also find clues about people’s overall health. By studying the teeth of
people, for example, paleopathologists can deduce what kinds of
they ate, how often they ate, and what nutrients the
incorporates written records into archaeological research. One of the most famous examples of
is the discovery and
of the Rosetta Stone. The
is a large slab of
discovered near Rashid, Egypt, by French
in 1799. It became an important tool of
The stone is
with a decree made on behalf of
Ptolemy V. The
was written and carved into the stone in three different languages: hiero
, demotic, and Greek. Hieroglyphics are the picture-symbols used for
is the in
Egypt. Before the discovery of the
, Egyptologists did not understand
. They could, however, understand Greek. Using the Greek portion of the
were able to translate the text and
. This knowledge has contributed vastly to our understanding of Egyptian history.
contributes to many
, including religious studies. The Dead Sea Scrolls, for instance, are a collection of about 900 documents. The tightly rolled parchment and other writing sheets were found between 1947 and 1956 in 11 caves near Qumran, West Bank, near the Dead Sea. Among the scrolls are texts from the Hebrew Bible, written in Hebrew, Aramaic, and Greek.
are the oldest versions of Biblical texts ever found, dating from between the third century BCE to the first century CE. The
also contain texts, psalms, and prophecies that are not part of today’s Bible. Discovery of the
has increased our knowledge of the development of Judaism and Christianity.
is industrial archaeology. Industrial
study materials that were created or used after the Industrial Revolution of the 1700s and 1800s. The
was strongest in Western Europe and North America, so most in
One of the most important sites for in
is the Ironbridge Gorge in Shropshire, England. The River Severn runs through the
, and during the
, it allowed for the transport of raw materials such as coal, limestone, and
. In fact, the world’s first
bridge spans the Severn there. By studying
(such as the
are able to trace the area’s economic development as it moved from agriculture to manufacturing and
Ethnoarchaeologists study how people use and organize objects today. They use this knowledge to understand how people used tools in the past.
culture of southern Africa, for instance, study the way modern
culture functions. Until the mid-20th century, the
, maintained a somewhat nomadic lifestyle based on hunting and gathering. Although the
culture had evolved significantly,
studying the tools of the modern
could still study the way
tracked and hunted animals and gathered native plants.
Environmental archaeologists help us understand the env
people in the past. Sometimes, env
is called human paleoecology.
discovered that the expansion of the Taquara/Itararé people of the Brazilian highlands is closely linked with the expansion of the evergreen forest there. The forest grew as the climate became wetter. As the forest provided more resources to the Taquara/Itararé people (timber, as well as plants and animals that depended on the
trees), they were able to expand their territory.
Experimental archaeologists replicate the techniques and processes people used to create or use objects in the past. Often, re-creating an
workshop or home helps
understand the process or method used by
people to create
. One of the most famous examples of experimental
is the Kon-Tiki, a large raft built by Norwegian
Thor Heyerdahl. In 1947, Heyerdahl sailed the Kon-Tiki from South America to Polynesia to show that
mariners, with the same tools and technology, could have navigated the
Forensic archaeologists sometimes work with geneticists to support or question DNA evidence. More often, they excavate the remains of victims of murder or genocide in areas of
is important to the understanding of the “Killing Fields” of Cambodia, for instance. The
are the sites of mass graves of thou
of victims of the Khmer Rouge regime of the 1970s. After the fall of the
studied the remains of the bodies in the
, discovering how and when they died. The
helped establish that the
used starvation and overwork, as well as direct killing, to silence opponents of the
working in the field of cultural resource management help
and preserve remains on sites where construction is scheduled to occur.
working as cultural resource managers often col
to balance the infrastructure and commercial needs of a
with historic and cultural interests represented by
found on construction sites.
Where to Dig?
involves digging. Winds and floods carry
and soil, depositing them on top of abandoned
. These deposits build up over time, burying the remains. Sometimes catastrophes, like volcanic eruptions, speed up this burial process. In places where earth has been carved away—like in the Grand Canyon in the U.S. state of Arizona—you can actually see the layers of
that have built up over the centuries, like layers of a cake.
Cities and communities also tend to be built in layers. Rome, Italy, has been an urban center for thou
of years. The streets of downtown Rome today are several meters higher than they were during the time of Julius Caesar. Centuries of Romans have built it up—medieval home on top of
home, modern home on top of
Establishing a dig site in an
area can be a very difficult process. Not only are the
of the area inconvenienced,
don’t know what they may find.
looking for an
Roman fortress, for instance, may have to first
a Renaissance bakery and
lie underground, scientists have developed methods to help them figure out where they should dig. Sometimes they choose sites based on old myths and stories about where people lived or where events occurred. The
city of Troy, written about by Greek poet Homer as early as 1190 BCE, was thought to be a work of fiction.
’s epic poem the Iliad was named after Troy, which the Greeks knew as Ilion. Using the Iliad as a guide, German
Heinrich Schliemann discovered the ruins of the city near the town of Hisarlik, Turkey, in 1870. Schliemann’s find helped provide evidence that the Trojan War may have actually taken place, and that
may be based on fact.
use historical maps to find
. In 1973, for instance,
to locate the wreck of the USS Monitor, an “ironclad” ship used by the Union during the Civil War. The Monitor sunk in a storm off the coast of Cape Hatteras, North Carolina, in 1862. After
, the United States designated the area as the nation’s first marine sanctuary.
Before securing a site, an archaeological team surveys the area, looking for signs of remains. These might include
on the ground or unusual mounds in the earth. New
has greatly increased their ability to
an area. For example, aerial and satellite imagery can show patterns that might not be visible from the ground.
Other technologies give clues about what lies under the surface. These techniques involve radar and
technologies often use radio waves, electrical currents, and lasers.
send these signals into the earth. As the signals hit something solid, they bounce back up to the surface. Scientists study the time and paths the signals take to familiarize themselves with the underground landscape.
Accidental finds can also lead
to dig sites. For instance, farmers plowing their fields might come across sherds of
. A construction crew might discover ruins beneath a building site.
discovery was made by accident. In 1974, agricultural workers in Xian, China, were digging a well. They discovered the remains of what turned out to be an
mausoleum for Qin Shi Huangdi, China’s first emperor. The
includes 8,000 life-sized clay soldiers, horses, chariots, and artillery, popularly known as the Terra Cotta Warriors. The archaeological research surrounding the
Terra Cotta Warriors
has provided insight on the organization and leadership style of
Qin Shi Huangdi
and the development of Chinese culture.
Once a site is chosen,
must get permission to dig from the landowner. If it is public land, they must
the proper permits from the local, state, or federal
Before moving a single grain of dirt,
make maps of the area and take detailed photographs. Once they begin digging, they will des
, so it is important to record how things looked beforehand.
The last step before digging is to divide the site into a grid to keep track of the location of each find. Then
choose sample squares from the
to dig. This allows the archaeological team to form a complete study of the area. They also leave some plots on the
like to preserve portions of their dig sites for future scientists to study—scientists who may have better tools and techniques than are avai
For example, during the Great Depression in the 1930s, programs to create jobs led to many archaeological digs around the United States. Some scientists on these digs removed
, such as
, but threw away charcoal and animal bones. These items were considered junk. Today, scientists are able to carbon-date the
and analyze the bones to see what kinds of animals people were domesticating and eating at the time. It is important that
today keep some parts of each site pristine.
involves digging in the earth.
and engineers work with sophisticated
to probe the earth below without disturbing the ground. National Geographic Emerging Explorer Dr. Albert Yu-Min Lin leads an innovative archaeological project centered in Mongolia. The Valley of the Khans project is using digital imaging, aerial photography,
, and digital
to locate the
of Genghis Khan. Using satellite
, Lin and his team can access information about the project without disturbing the land or even going to Mongolia.
The Big Dig
The process of researching and securing a dig site can take years. Digging is the field work of
. On occasion,
might need to move earth with bulldozers and backhoes. Usually, however,
use tools such as brushes, hand shovels, and even toothbrushes to scrape away the earth around
The most common tool that
use to dig is a flat trowel. A
is a hand-held shovel used for smoothing as well as digging.
to slowly scrape away
. For very small or delicate remains,
might also dig with dental picks, spoons, or very fine blades. Often, they will sift dirt through a fine mesh screen. Tiny remains, such as beads, can often be found this way.
take lots of notes and photographs along each step of the process. Sometimes they include audio and video recordings. Global positioning system (GPS) units and data from geographic information
(GIS) help them map the location of various
with a high level of precision.
find remains, they are often broken or damaged after hundreds or even thou
of years underground. Sunlight, rain,
, animals, bacteria, and other natural processes can cause
to erode, rust,
, break, and warp.
Sometimes, however, natural processes can help preserve materials. For example, sediments from
can encase materials and preserve them. In one case, the chill of an Alpine glacier preserved the body of a man for more than 5,300 years! The discoverer of the so-called “Iceman,” found in the Alps between Switzerland and Italy, thought he was a recent victim of
, or one of the glacier’s crevasses.
studying his body were surprised to learn that he was a
victim—the crime just took place more than 5,000 years ago.
are uncovered, the archaeological team records every step of the process through photos, drawings, and notes. Once the
have been completely removed, they are cleaned,
, and classified.
Particularly fragile or damaged
are sent to a conservator.
have special training in preserving and restoring
so they are not des
when exposed to air and light. Textiles, including clothing and bedding, are especially threatened by exposure.
must be familiar with
, as well as the chemical composition of the cloth and dyes, in order to preserve the
In 1961, Swedish
recovered the ship Vasa, which sank in 1628. Conservators protected the delicate oak structure of Vasa by spraying it with polyethylene glycol (PEG). The ship was sprayed with PEG for 17 years, and allowed to dry for nine. Today, Vasa sits in its own
, a hallmark of Swedish heritage.
are sent to a
for analysis. This is usually the most time-consuming part of
. For every day spent digging,
spend several weeks processing their finds in the
All of this
—counting, weighing, categorizing—is necessary.
use the information they find and combine it with what other scientists have discovered. They use the combined
to add to the story of humanity’s past. When did people develop tools, and how did they use them? What did they use to make clothing? Did their clothing styles indicate their social ranks and roles? What did they eat? Did they live in large groups or smaller family units? Did they
with people from other regions? Were they warlike or peaceful? What were their religious practices?
ask all of these questions and more.
The scientists write up their findings and publish them in scientific journals. Other scientists can look at the
and debate the interpretations, helping us get the most accurate story. Publication also lets the public know what scientists are learning about our history.
The ABCs of Dating
Sometimes dates are listed as BC or AD. Other times they show up as BCE or CE. What is the difference?
BC stands for Before Christ, and it is used to date events that happened before the birth of Jesus, whom Christians consider the son of God. AD refers to Anno Domini, Latin for year of our Lord, and refers to all the years from Jesus birth onward. In the late 20th century, scientists realized they were basing the entire history of the world around the birth of one religious figure.
Many archeologists now prefer the terms BCE (Before Common Era) and CE (Common Era). The dates are still the same, only the letters have changed.
Some ancient humans may have indulged in cannibalism on a regular basis. Archaeologists discovered 800,000-year-old remains from an early human species, Homo antecessor, in a Spanish cave. Among the remains were human bones with marks on them that appear to come from stone tools used to prepare meals.
Sherds and Shards
Many archaeologists study broken bits of pottery. These fragments are called potsherds, and sometimes just sherds. Sherds can be anything from bits of a broken water jug to a piece of a clay tablet to the components of China's "Terra Cotta Warriors."
Most archaeologists study the past, but some study people who are still alive. For example, Dr. William Rathje uses his archaeological skills to dig through present-day garbage bins and landfills to learn about what Americans consume, discard, and waste.
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