An interdisciplinary, online, wiki-based encyclopedia "about the Earth, its natural environments, and their interaction with society...

Around 300 articles on "all types of phenomena that change life on Earth...

"Covers all major areas of science, engineering, technology, as well as mathematics and the medical and health sciences, while providing a comprehensive overview of current scientific knowledge and technology...

More than 1,000 entries on "aspects of geology, including climatology, mineralogy, and oceanography...

Online encyclopedia covering many areas in the sciences: chemistry, computer science, earth science, environmental science, forensic science, mathematics, physics, space and astronomy, and weather and climate...