Wolfram Alpha

Wolfram|Alpha’s long-term goal is to make all systematic knowledge immediately computable and accessible to everyone.

Is Wolfram|Alpha a search engine?

No. It’s a computational knowledge engine: it generates output by doing computations from its own internal knowledge base, instead of searching the web and returning links.

When will Wolfram|Alpha be finished?

Never. There’ll always be knowledge to be added and updated, and new capabilities to be introduced. The Wolfram Mathematica system (on which Wolfram|Alpha is built) has been in continual development since 1988.

Can I trust results from Wolfram|Alpha?

We certainly hope so. We spend considerable effort on automated testing, expert review, and checking external data that we use. If you ever see a problem, please report it.

The topics that you receive information about:

Mathematics »
Statistics & Data Analysis »
Physics »
Chemistry »
Materials »
Engineering »
Astronomy »
Earth Sciences »
Life Sciences »
Technological World »
Transportation »
Computational Sciences »
Web & Computer Systems »
Units & Measures »
Money & Finance »
Places & Geography »
Socioeconomic Data »
Weather »
Health & Medicine »
Food & Nutrition »
Words & Linguistics »
Culture & Media »
People & History »
Education »
Organizations »
Sports & Games »
Music »
Colors »



The Math Forum: People learning Math together

… the leading online resource for improving math learning, teaching, and communication since 1992.

Ask Dr. Math


Math Tools

The Problems of the Week Program

Internet Mathematics Library

MathForum: MathForum


Connecting Mathematics: brief explanations of mathematical terms and ideas Mathematical terms and ideas


ABACUS International Math Challenge

The ABACUS International Math Challenge was launched in 1997 by Tivadar Diveki, head of Grace Church School’s science department. The program is based on a printed journal for gifted students, originating in Hungary over 100 years ago.



Participants over the years included Edward Teller, Leo Szilard and other notables in physics, computer science and mathematics. Today’s Abacus is designed for students of all abilities and demonstrates that mathematical talent can be stimulated and developed through individual attention, instant feedback and challenging subject matter with flexible levels of difficulty.

The Internet has made this program available to students around the world. Every month, eight problems are posted for each of three age groups. Students are asked not only to solve the problems but also to present the reasoning in their solutions. If a student submits an incorrect solution or is simply having trouble with a problem, a teacher will offer hints as to how to go about solving the problem, giving students multiple chances to succeed.

Abacus: Abacus

The journal KöMaL

KÖMAL: The journal KöMaL


M-Buttons: Demonstrative figures and animation drawings for teaching solid geometry…

Basic of the geometry, Regular polyhedrons, Connections between regular polyhedrons, Icosahedrons and golden section, Conic sections, Dandelin-spheres, The principia of Cavalieri, Other interesting polyhedrons


Mandelbrot set

In mathematics the Mandelbrot set, named after Benoît Mandelbrot, is a set of points in the complex plane, the boundary of which forms a fractal …

Wikipedia: Mandelbrot set

Skytopia: Mandelbrot set



A nice math teacher web page. It is designed for ages 13-100!

Coolmath Prealgebra

Coolmath Algebra

Geometry Information and Art

Math Puzzles

CoolMath: Cool Math

Cool Math 4 Kids

Cool Math 4 Kids: Cool Math 4 Kids


Space research

International Space Station comes together

A nice flash animation produced by Robert Ahrens and Julia Schmalz on USA TODAY.

USAToday: International Space Station comes together

International Space Station

NASA: International Space Station

International Space Station

Wikipedia: International Space Station

Scienceclarified: International Space Station

USAToday: Space station to get final solar panels



History of NAVSTAR GPS

The GPS System was created and realized by the American Department of Defense (DOD) and was originally based on and run with 24 satellites (21 satellites being required and 3 satellites as replacement).



Galileo Navigation System

EU strives for more stable navigation system similar to the U.S. GPS

Galileo Navigation System



The Global Positioning System (GPS) is a global navigation satellite system (GNSS) developed by the United States Department of Defense and managed by the United States Air Force 50th Space Wing.

Wikipedia: GPS


The Sun

General information about our Sun: diameter, mass, temperature and other interesting data.

… continue

Wikipedia: Sun The Sun

Michielb: The Virtual Sun

Windows to the Universe: The Sun

BBC Home: The Sun

NASA Goddard Space Flight Center: The Sun – Introduction

Stanford Solar Center: About the Sun

KidsAstronomy: The Sun

The National Maritime Museum: What is the Sun?


Our Solar System

Science Nationalgeographic: Solar System


Interactive Solar System

Kids Astronomy: Solar System


A Multimedia Tour of the Solar System

Nineplanets: Solar System



The Voyager program is a series of U.S. unmanned space missions that consists of a pair of unmanned scientific probes, Voyager 1 and Voyager 2.

Wikipedia: Voyager program



Questions for The Professor – Periodic Table of Videos

Professor Martyn Poliakoff answers a series of questions from students at a US middle school.

Daily Telegraph: YouTube periodic table: Explosive video guides




Philosophy is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language …

Wikipedia: Philosophy



Wikipedia: Buddhism
Buddhanet: Buddhanet
Alexander Csoma de Körös, Founder of Tibetan Studies Alexander Csoma de Körös



Wikipedia: Atheism
infidels: Atheism
BBC Home: Atheism
The New York Times: Atheism


Skpetic – Promoting Science and critical thinking

Skeptic Society and Skeptic Magazine
The Committee for Skeptical Inquiry
the Secular web
Freedom form Religion fundation



Center for Naturalism
Naturalism Philosophy Forum
Naturalism (philosophy)
the Secular web
The Committee for Skeptical Inquiry