In a whale-sized project, the world’s scientists plan to compile everything they know about all of Earth’s 1.8 million known species and put it all on one web site, open to the public free of charge.

The effort, called the Encyclopedia of Life, will include species descriptions, pictures, maps, videos, sound, sightings by amateurs, and links to entire genomes and scientific journal papers. Its first pages of information were shown May 9 in Washington, D.C., where the massive effort was announced by some of the world’s leading scientific institutions and universities. The project will take about 10 years to complete.

“It’s an interactive zoo,” said James Edwards, who will be the encyclopedia’s executive director. Edwards currently helps run a global biodiversity information system.

If the new encyclopedia progresses as planned, it should fill about 300 million pages, which, if lined up end-to-end, would be more than 52,000 miles long, able to stretch twice around the world at the equator.

The MacArthur and Sloan foundations have given a total of $12.5 million to pay for the first two-and-a-half years of the massive effort, but it will be free and accessible to everyone–students, teachers, scholars, and others alike.

The pages can be adjusted so they provide useful information for both a schoolchild and a research biologist, with an emphasis on encouraging “citizen-scientists” to add their sightings. While amateurs can contribute in clearly marked side pages, the key detail and science parts of the encyclopedia will be compiled and reviewed by experts.

“It could be a very big leap in the way we do science,” said Cristian Samper, acting secretary of the Smithsonian Institution, one of seven museums, universities, and labs to launch the encyclopedia. “This is a project that is so big, not even the Smithsonian could do it by itself. It is a global effort.”

Other institutions helping to head the undertaking are Harvard University, Chicago’s Field Museum, the Marine Biological Laboratory in Massachusetts, the Biodiversity Heritage Library Consortium, the Missouri Botanical Garden, and the Atlas of Living Australia.

For more than a decade, scientists have tried to compile simply a list of all species on Earth, but have failed. It’s been too complicated, too expensive, and too cumbersome.

This effort might succeed where the others have faltered, because of new search-engine technology–the same kind that Google uses. It will scan the web for scientific information and “mash up” all of the material into a file that then gets reviewed by expert curators, said Harvard’s James Hanken, a steering committee member.

For scientists, especially those in developing countries, this can open up new worlds of research, said Samper, who has worked as a biologist in Colombia studying South American plants. And that means more science from different areas, he said. Research papers that used to be limited to northern science libraries will be easily accessible in remote Botswana, he said.

Sample demonstration pages on the polar bear show what the scientists hope to do. They offer pictures, maps, research, and data on the molecular biology, genetics, reproduction, and diet of the polar bear.

The information can be accessed at the “novice” level, which says: “Polar bears inhabit Arctic sea ice, water, islands, and continental coastlines.” At the “expert” level, it says: “Polar bears occur in low numbers throughout their range and are most abundant in shallow water areas near shore or where current or upwellings increase biological productivity near ice areas associated with open water, polynyas, or lead systems.”

As new species are discovered each day, they’ll be added, scientists say. And long-gone species also will appear. “If we don’t include dinosaurs, we’ll have lost 6-year-old boys,” Edwards said.