San Pedro River
Last Great Places
Stream Flow Data
Plant Identification
Aravaipa Canyon Hike

Megafauna and Extinction
Distribution of Megafauna
Megafauna Extinctions #1
Megafauna Extinctions #2
Mass Extinctions Rates
Ice Age Animals
Wooly Mammoth

Clovis and Folsum Cultures:
Clovis/Folsom Transition
Clovis Points
Clovis Culture
PaleoIndians
Lehner Ranch Site
Lehner and Naco Ranch Sites
Atlatl
Flintknapping
Using an Atlatl

Easter Island Model
The Lessons of Easter Island
Terminology
Canibalism
Photographs of Moai Statues
Easter Island Today
Easter Island Home Page
The Last Tree
Nova Lost Empires
Mysterious Places
Virtual Tour

Population
U.S. Census Data
World Population Vital Facts and Pyramids
CIA World Factbook
World PopClock
U.S. PopClock
Ecological Footprint

Math
Mental Math
Scientific Notation1
Scientific Notation 2
Percent Chart
*Decimal Scales
Ordering Decimals
Decimal Games
Math Models
Metric System
Unit Conversions
Metric Conversions
Easter Island Model
Other Math Links
Aravaipa Math Department

*This program will run faster if you download it to your own computer. Right-Click on the name of the program and choose Save Target As. Then click on the .exe file in your computer file directory to run the program.

Radioactive Dating
Carbon 14 Dating
HalfLife
Examples of Rocks and Materials Dated
Anazazi Mystery
Half Life of Drugs