How do we know: ancient environments


August 12, 2007
91 Views

Lucy’s remains were found in a desert environment. However, if Lucy could come back today, she would not recognize the place she once called home. It appears that 3 milion years ago, this part of Africa was a lot more forested that it is today.  That is interesting, but how do we know this?

Reconstructing an ancient environment, like the work of a good detective, relies on looking for as many clues as possible. One of these clues are pollen.  We are all too familiar with pollen, as we suffer through allergy attacks every year. Pollen, the powder consisting of pollen grains, carry the male sex cells of seed plants. They are virtually indestructible and easily identifiable under a microscope. Soil samples taken from the walls of excavation trenches are analyzed for their pollen content. This allows us to identify what plants lived in the area and how they fared over time. Plants are good indicators of environmental conditions; having a preponderance of tree pollen during a certain time period would allow one to suggest that the area was forested at that time.

Fossilized animal remains can also help reconstruct the environment. Encountering the remains of  tree dwelling animals is an indication of the presence of a tree environment. Fish bones or the remains of hippos and crocodiles, would imply a lake or river environment.

Fluctuations in temperatures over long periods of time can be retraced using oxygen isotope analysis in ice samples. Tree ring data can also tell us about similar changes in temperatures and rainfall.

Reconstructing ancient environments will never be as accurate as what we expect to hear from the weatherman, yet these reconstructions provide us with a big picture that is sometimes quite different from what it is now. The forested environment in which Lucy once roamed compared to the present-day desert is a good case in point.

Dirk
Authored By Dirk Van Tuerenhout

As curator of anthropology, Dirk is responsible for the museum’s artifact collection and is involved in its temporary and permanent anthropology exhibits. Dirk is an expert in human cultures; he curates the Museum’s Hall of the Americas and specializes in native American cultures like the Aztec and Maya.

Leave a Reply

Your email address will not be published. Required fields are marked *

Become An HMNS Member

With a membership level for everyone; Don't just read about it, see it.

View All Membership Levels

Editor's Picks My Favorite Part About Camp! Unwrapping HMNS: An Interview With A Gladiator May Pixel Party Recap: What Happens When You Let A Bunch Of Expert Photographers Loose At HMNS? May Educator How-To: Make a Roman Mosaic What’s The Splatter? The Science Behind Bug Guts on your Windshield. 5 Of The Rarest Objects On Display At HMNS
Follow And Subscribe
HMNS at Hermann Park

5555 Hermann Park Dr.
Houston,Texas 77030
(713) 639-4629


Get Directions Offering varies by location
HMNS at Sugar Land

13016 University Blvd.
Sugar Land, Texas 77479
(281) 313-2277


Get Directions Offering varies by location
George Observatory

21901 FM 762 Rd.
Needville, Texas 77461
(281) 242-3055

Hours
Tuesday - Saturday By Reservation
Saturdays 3:00PM - 10:00PM
Saturdays (DST) 3:00PM - 11:00PM
DST = Daylight Savings Time.
Please call for holiday hours. Entry to Brazos Bend State Park ends at 9:30 p.m. daily
Get Directions Offering varies by location

Stay in the know. Join our mailing list.