Survival Skills
Most of what we know about ancient Homo
sapiens comes from the work of archaeologists and other scientists. To
do their work, archaeologists choose a place where they believe humans
once lived. This place is called a site.
When
excavations are underway, a site is often referred to as a dig. At their
site, archaeologists begin by tying string in a pattern of squares
called a grid. Then they dig through the soil layer by layer. As they
dig, they carefully sift through the dirt, looking for fossils and
artifacts, or human-made objects.
Archaeologists record
the square and the layer each fossil or artifact was found in. This
important information will help them later as they examine their
findings. A careful examination might reveal such information as a
fossil's age or the purpose of a piece of pottery or other artifact.
One
way that experts judge the age of fossils is through radiocarbon
dating. Radiocarbon dating tells how much carbon remains in a
once-living person, animal, or plant. All living things contain
radioactive carbon. After death, however, the radioactive carbon begins
to decay.
By measuring the amount of carbon left in a
fossil, experts can identify its age. Radiocarbon dating can only be
used for fossils 50,000 years old or younger.
Archaeologists
and other scientists have uncovered many important facts about Homo
sapiens. Like the early people before them, the first Homo sapiens lived
together in bands. Usually the bands were made up of related families.
About 20 people lived in each band. Band members worked together to meet
their basic needs for food, clothing, and shelter. Without such
cooperation, individuals probably would not have survived.
The
small bands spent many hours of their days searching for the food they
needed to survive. Much of their diet consisted of wild fruits, nuts,
roots, and seeds. They also caught and ate fish, turtles, birds, and
small rodents. Experience taught them which plants and animals could be
eaten without an unwanted consequence, or effect, such as illness.
These
early people also hunted large animals. Many of these animals, such as
giant oxen, woolly rhinoceroses, and the elephant-like mammoths, are now
extinct, or no longer living. Other common prey, such as reindeer and
bison, still exist. All these animals provided meat for food, bones for
tools, and skins for clothing and shelter.
To kill
large animals, early hunters needed special tools. Unlike Homo erectus,
Homo sapiens made different kinds of tools for different needs. These
people sharpened stones, animal bones, antlers, or tusks to make spears
and knives for hunting. They also made needles for sewing animal skins
together and hooks for fishing.
Because early bands
were always on the move, they had no permanent year-round settlements.
Instead, they set up seasonal camps in caves or rock shelters near
places where plants and animals were plentiful. When food was no longer
available in one place, bands moved on to the next place. Usually, bands
traveled around a particular area as they searched for food. By
following a regular seasonal pattern of migration, or movement from one
place to another, bands of hunters and gatherers found enough to eat.
Why was cooperation important for early hunters and gatherers?
Neanderthals
In
1856, workers digging for stone made an unusual discovery in a buried
cave in Germany's Neander Valley. They found an odd-looking human skull
along with leg and arm bones. Later, British biologist Thomas Huxley
identified the discovery as an early Homo sapiens fossil, the first ever
found. The fossil soon gained the name Neanderthal, after the valley in
which it was found. Scientists now know that while Neanderthals are
Homo sapiens, they are not our direct ancestors.