HEATKEYS

The best information on the Golden Section, Divine Proportion, Fibonacci series and phi. Explore its application to art, design, life, beauty, mathematics, geometry, stock markets, theology, cosmology and more.

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

Comprehensive encyclopedia of mathematics with 13,000 detailed entries. Continually updated, extensively illustrated, and with interactive examples.

Groundbreaking developments in science, space, technology, health, and the environment

YouTube is a place to discover, watch, upload and share videos.

PhiMatrix: Design and analysis software based on phi, 1.618..., the Golden Ratio. Unveil the beauty, harmony and balance of nature

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & person...

The Math Forum is the comprehensive resource for math education on the Internet. Some features include a K-12 math expert help service, an extensive database of math sites, online resources for teaching and learning math, plus much more.

An electronic journal of philosophy, promoting the principles and the further development of the Critical Philosophy of Immanuel Kant, Arthur Schopenhauer, and the Friesian School, i.e. Jakob Fries, Leonard Nelson, Rudolf Otto, Karl Popper, F.A. Haye...

Mind and Visual Puzzles and Activities that enhance critical, logical,and creative thinking skills, and keep your brain active!