Products

All of Selvasis, in one place

Science without jargon, checked by hand, in whatever format you like best: to read, to explore for free, or to play.

To read

All 5 ebooks —mathematics, physics, biology, astronomy and chemistry— without jargon and checked by hand. PDF + EPUB.

A Wonder of the Day and a growing archive of astonishing, true facts to explore out of pure curiosity.

The games are still in Spanish — but a word search does not need much translating.

30 word searches with the vocabulary of the cosmos. Find the words and unlock an astonishing fact in each one.

Three sample sudokus — easy, medium and hard. A unique solution and, once solved, an astonishing number from science.

Two sample crosswords — the atom and water. The words cross and help each other, and reveal a fact once solved.

Three sample mazes. One single path to the exit and, when you get there, a wonder of the universe.

Three science sheets to color online — solar system, Fibonacci sunflower, cell. Pick a color and paint.

Soon

Science word searches and sudokus as premium print-ready PDFs, with solutions and facts. Crosswords, mazes and coloring sheets on the way.

Coming soon

News, launches and one wonder in your inbox. No spam, no noise.

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We are still building the jungle. In the meantime the encyclopedia grows here every day — and every fact is still checked by hand.