| National_Biological_Information_Infrastructure Electronic gateway to biological data and information maintained by federal, state, and local government agencies, and private sector organizations. |
| Natural_History_Museums_&_Collections Collection of botanical gardens, arboretums, herbaria, zoos, and aquarium links from the University of Washington. |
| Reactome_-_a_knowledgebase_of_biological_processes Curated database of biological processes in humans. |
| TheLabRat_com A site designed for the life scientist (aka The Lab Rat). Sections dedicated to career, news, message boards, chat room, and protocols and reagents. |
| Top20Biology_com Online directory for biology education including algae, fungi, botany, zoology, insects and spiders, reptiles, birds, and amphibians. |
| Acid_Deposition_Monitoring_and_Research_in_the_UK Information about the acid deposition monitoring networks managed by the National Environmental Technology Centre (AEA Technology plc). |
| Acid_Rain Facts, news, children's resources, and links from Environment Canada. |
| Acid_Rain_News Features links to news articles and related sites. Includes history, scientific background information and FAQ. |
| The_Acid_Rain_Report Student-created site discusses the causes, effects, geographic distribution, and possible solutions for acid rain. |
| Acid_Rain--A_Contemporary_World_Problem This website explores the causes and solutions to the acid rain problem. |
| Margot\'s_Acid_Rain_SEA_Project Student's fun and informative site about acid rain, in North Carolina and in general. |
| National_Atmospheric_Deposition_Program_(NADP) US federal-state-NGO cooperative effort operating a national precipitation monitoring network to observe geographic and temporal trends in acidity, mercury, and other attributes. Includes data, maps, |
| PPRP_Atmospheric_Deposition_Measurement_and_Analysis Information about and from regional acid deposition monitoring programs in the Chesapeake Bay watershed (USA). |
| UK_Acid_Waters_Monitoring_Network Monitors the ecological impact of acid deposition in areas of the United Kingdom believed to be sensitive to acidification. |
| UK_DTI_Energy_and_the_Environment_Programme The programme aims to assess the impacts of proposed energy related environmental policies and regulation on UK industry, and their cost implications for the final consumer. |
| US_EPA_-_Acid_Rain Information about causes and effects, how acid rain is measured, and what is being done to solve the problem. Includes activities for students. |
| US_EPA_Acid_Rain_Program About EPA efforts reduce electric utilities' emissions of sulfur dioxide and nitrogen oxides, the pollutants responsible for acid deposition. The program includes a system of tradable SO2 emissions al |
| U_S__Geological_Survey_Data_and_Reports_on_Acid_Rain,_Atmospheric_Deposition_and_Precipitation_Chemistry Information resources on acidic deposition in the United States. |
| What_is_Acid_Rain_and_What_Causes_It? A discussion of the causes and effects of acid rain, and possible policy solutions. |
| The_Monitoring_Acid_Rain_Youth_Program_(MARYP) Summary report of an educational program where young people monitored acid rain levels in a network of forest stations. Page includes list of participants. (1996) |
| Agricultural_History_Society Organization and conference information. |
| Agropolis-Museum A Science Center dealing with topics such as food, nutrition, agriculture, with a historical approach on a worldwide scale. Website has virtual exhibitions on the history of food and agriculture, far |
| ARS_Timeline__138_Years_of_Ag_Research A brief history of agricultural research from 1862 to the present, organized by decade. Highlights of research carried out in the U.S. Department of Agriculture are featured. |
| British_Agricultural_History_Society Promotes the study of agricultural history and the history of the rural economy and society. Organization information, upcoming conferences, and links to related websites. |
| Chronology_of_Horticulture Chronology of the development of horticulture in Europe and North America, with a set of articles on associated topics. |
| Ferguson_Society An history of the development of the Ferguson tractor. |
| Fruit_Fly_History_Hawaii Contains a history of the USDA Agricultural Research Service's fruit fly research in Hawaii. Presented in layperson's terms. Illustrated. |
| Historical_Series_-_Agriculture_Canada Collection of monographs on the history of Canadian agriculture, agribusiness and agricultural research, the research establishments, experimental stations, their activities and specialities, original |
| History_of_Farming Illustrated overview of the origins and development of agriculture, with bibiliography, notes from early cultures, and pictures of early farm implements and tractors. |
| History_of_Farming_and_Cities Links to pages which give research on the development of farming and cities by culture. |
| History_of_Horticulture Course outline that was distributed to students in Ohio State University Professor Freeman S. Howlett's course titled "The History and Literatur |
| Module_Truck_Systems_Inc_ History and pictures of cotton modules and cotton module trucks. (Lubbock, Texas, USA) |
| The_Potato_Then_and_Now__History The history of potato cultivation and its role in society, including the Irish potato famine. Particular focus on Prince Edward Island, Canada. |
| Seeds_of_Trade Introduction to the history of cultivation and spread of some common crops. |
| Tumbledown_Farm Features published original sources for 19th and early 20th century rural culture, farming methods, and gardening skills. |
| Ancient_Pi__Knowers_of_the_Universe The concept of pi refers to the constant ratio of the diameter:circumference of any circle; irrespective of the number of degrees contained within that circle. An article in the "Science in Ancient A |
| Ask_Dr__Math_-_Pi Dr Math answers over 60 questions submitted by people about pi including questions on the Bible's relationship to it and its relationship to trigonometry. |
| Ask_Dr__Math__About_Pi Explains what the constant is and a brief history. Includes resource links. |
| Buffon\'s_Needle An analysis of its relation to Pi and a simulation by George Reese. |
| Calculating_Pi An open source endeavor for the calculation of this constant. Describes the project, the implemented algorithms for calculatinon and software downloads. |
| A_Common_Book_of_Pi Includes a brief history, a page with different formulas and a list of references. |
| The_Constant_Pi History, formulae, algorithms, programs, records of computation, and references. |
| Dale\'s_Pi_Page Includes history of Pi, songs and jokes, poems, news and the first 1,000,000 digits. |
| Earth_Mysteries___Notes_on_Pi An introduction to the number Pi and its history. |
| Elias\'_Pi_Page Includes Pi in the Binary number system, Pi as a sound file and Pi shown in different images. |
| Fun_With_Pi A Topica email list. Archives readable by anyone. |
| Harry_Smith\'s_Brief_History_of_Pi_Calculations Brief history of Pi calculations from the ancient times to present day. |
| History_and_Philosophy_of_Pi Probably no symbol of infinity in mathematics has evoked as much mystery, romanticism, misconception and human interest as the number and Greek letter of Pi. Interesting facts and trivia about Pi. |
| How_pi? Extracting the digits of pi from the SlOka |
| How_Stuff_Works__Pi Animated graphic helps to explain Pi and the different ways of calculating Pi, with some related links. |
| Indiana_Pi_Bill Bill proposing new value of pi. |
| The_Joy_of_Pi Book, digits, links, facts, and quote. |
| Land_of_Pi Pi digits, random links, and some downloads. |
| Lucy_Scale_Developments Pitch, Pi, and other musical paradoxes. |
| The_Magic_Piworld Provides generated pictures and personal signs out of digits of Pi. Also a Picture Gallery, PiSign, PiPhonie. |
| A_New_Approach_to_the_Universal_Constant_\"pi\" A text that tries to prove that pi is 3.1416 exactly. |
| Paul\'s_Page_of_Pi Includes introduction on why people would want to calculate Pi, four methods for calculating it, over 8000 digits, poems and music. |
| Pi_3_1416 Mathematics as the language of nature. |
| Pi_Approximation_Day 22/7 - that is, July 22. For the past few years, people at Chalmers University have celebrated it. |
| Pi_Land Fun activities, a Pi trivia game and a Trainer for digit memorization. Pi poetry, artwork, and photography, calculations, digits and book reviews. |
| Pi_Memorama Includes a program that teaches Pi for the Mac, a page on why people learn to recite Pi and pages on how to memorise Pi. |
| The_Pi_Pages Information on Pi, its history, its future, and the people involved in its calculations. |
| Pi_Patterns Images and illustrations created by using the digits of the circle constant. |
| Pi,_Pi,_Mathematical_Pi Parody of the song "Bye Bye Miss American Pie" elaborating on the history of pi. |
| The_Pi_Song Written by Joel Gilmore. (Sung to the tune of Supercalifragilisticexpialidocious.) |
| Pi_Through_the_Ages History. |
