Treebeard's Links
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- About.com Puzzles and - lots of originals and links
- Absurd Math: Pre-algebra from another dimension - Interactive stories with math problems. I haven't tried it.
- ACM International Collegiate Programming Contest Problem Archive - Lots of tricky programming puzzles
- The AIMS Puzzle Corner
- AFU and Urban Legends Archive and FAQ - good stuff from alt.folklore.urban
- The Answer Bank - Q&A about anything, you can post your own questions
- Archimedes' Laboratory - nice collection of puzzles and games
- Ask Science Questions - meta-list of "Ask a [***] Scientist" Web sites
- Ask A Physicist - from NASA Cosmic and Heliospheric Learning Center
- Ask A Scientist - medical and biology Q&A from Howard Hughes Medical Institute, with nice page on Becoming a Scientist
- Ask The Astronomer - Dr. Sten Odenwald huge collection of Astronomy Q&A
- Ask Bob - Science Q&A by Quirks and Quarks radio show by host Bob McDonald
- Ask Discover - general science Q&A from Discover Magazine
- Ask Dr. Math
- Ask Dr. Neutrino - Physics Q&A
- Ask Dr. Science - funny stuff from Duck's Breath Mystery Theatre, there's also a Real Audio archive
- Ask a High-Energy Astronomer - Cosmology Q&A from NASA
- Ask Jack - Weather Q&A
- Ask Science Theater - archive of science Q&A by students at Michigan State University, no longer happening?
- Ask the Space Scientist- a mirror of Dr. Sten Odenwald's Ask The Astronomer
- Astronomy Quiz
- Bad Astronomy - entertaining reviews and comments by Phil Plait
- Bad Science - by Alistair B. Fraser, there are also pages on Bad Chemistry and Bad Meteorology7
- BBC SCience and Science Shack - science features from BBC
- The Big List of Puzzle and Riddle Pages
- BrainBlisters - lots of puzzles (formerly BrainBashers)
- The Brain Exerciser - Mathematical riddles
- Brain Food
- Braingle - almost 2000 brain teasers, you can register and submit/rank puzzles
- Brain Teasers from Fitzweb - Javascript puzzles
- The Burr Puzzles Site - online JAVA burr puzzles from IBM, confusing interface
- Card Trick Central - They are all stumpers till you figure it out
- The Case - Court puzzles
- The Challenge Factor - Shockwave puzzles
- Caissa's Web - entry to the Internet Chess Server
- Centre for Innovation in Mathematics Teaching (CIMT) Puzzle Pages - lots of puzzles and some answers
- Clifford Pickover's webpage and discussion group - more than math and science from prolific author
- College Prep Quiz - multi-subject quiz for time, miss one and you start over. This is fun!
- Combinatorial Game Theory - links to mathematical treatments of some strategy games
- Conceptual Physics Surf - Q&A and links from author Paul Hewitt
- Cool Puzzles, Games, and Applets - lots of stuff
- Cool Quiz Network - links to many simple online quizzes, eg a Map Quiz. Requires Shockwave, and slow to load.
- Creative Puzzles: alt.brain.teasers archive - The make your own puzzles page is especially good.
- CRpuzzles - traditional pencil and paper puzzles in slick Java format
- Curiouser.co.uk - Rob McMullen's attractive collection of puzzles and paradoxes, worth exploring
- Cut The Knot and the CTK Exchange - math Q&A with some stumpers
- Delphi For Fun - lots of small math and word programs with source code and algorithms
- Devlin's Angle
- The Dilbert Zone Daily Mental Workout and archive - with cartoons!
- Do Science - Food tricks and stumpers by Eric Muller
- Dr. Matrix' Mind Games
- Earth and Sky - transcripts and audio of daily science radio show
- EncycloZine Perplexing Puzzles - impressive Java site with games, puzzles, mazes, illusions, and a wide range of general topics.
- The Engines of Our Ingenuity - elegant musings on technology and ingenuity by John Lienhard of The University of Houston's College of Engineering.
- Erich's Place - Erich Friedman presents lots of tough puzzles, especially in geometrical packing and combinatorial geometry, with a problem archive
- Explorit Science Center - Monthly Science Challenges
- Explorit Science Stumpers - tricky Q&A about science history
- Exploratorium Science Snacks - interesting science demos
- Favorite Math Constants - from Steven Finch and friends
- Figure This! Math Challenges for Families - slick collection of not-too-hard stumpers from NSF and National Council of Teachers of Mathematics
- Freeware Games - download links to games and puzzles
- Fun Mathematics Lessons - by Cynthia Lanius, several of these lessons are good stumpers
- Fun With Mathematics! - recreational math from Harry J. Smith
- Fun With Words - serious wordplay, including oxymora
- Games Domain Download Page
- General Chemistry Online FAQ - chemistry Q&A
- Geometry and the Imagination - by John Conway, Peter Doyle, Jane Gilman, and Bill Thurston, interesting puzzles from a master.
- The Geometry Junkyard
- Glossary of Mathematical Mistakes - the raw material of many stumpers, also check the Reader Submitted Examples
- Google Answers - I use Google as the source of all knowledge, but they also offer a pay-for-anser service. You can read old questions and answers for free
- The Greatest Places - Geography stumpers from Dr. Cecil Keen
- Great Moments in Science - large archive of science essays by Karl Kruszelnicki from Australia
- The Grey Labyrinth
- Guinness World Records - slick site with fun trivia
- Hexi - interesting Java strategy game with nice (but distracting) animation. Is there a winning strategy?
- Home of the Underdogs - A place to find abandoned games, including puzzle favorites like Fool's Errand and Scott Kim's great Heaven & Earth
- HotAIR - Web version of Annals of Improbable Reasearch, funny!
- How Stuff Works - useful explanations of things we take for granted, check their Question Archive
- How Things Work - large collection of interesting Q&A hosted by Louis A. Bloomfield of The University of Virginia, be sure to check out the Book Supplements
- Insultingly Stupid Movie Physics - reviews of the physics in popular movies
- Interactive Games on the Web - big list of interactive Web games
- Interactive Mathematics Miscellany and Puzzles
- International Mathematical Olympiad and IMO Problem Archives - tough math problems (and solutions!) from world-class competition
- The Internet Math Challenge
- Inwit Publishing - writings and links on science topics
- Javalovers Applet Showroom - JAVA puzzles and games
- Jeopardy Online - real games on the Web
- John Rausch's Puzzle World - handcrafted mechanical puzzles for sale and view, also great Stewart Coffin books for free download
- Journal of How Things Work - published by Louis A. Bloomfield of The University of Virginia
- Kasparov Chess - chess portal from Garry Kasparov
- Ken Duisenberg's Puzzle of the Week and Puzzle Links
- Kevin Brown's MathPages - physics too, interesting advanced discussion
- The Last Word - Interesting science Q&A from New Scientist, a great reference
- The Lateral Puzzles Forum - an online newsgroup for tough orginal problems
- The Little Math Puzzle Contest - large collection of school puzzzles (lots of "complete the sequence")
- Logic Mazes - was Robert Abbott's Mazes, hard online mazes, requires JAVA
- The Logic Problems Page - with samples and tutorials on how to solve them
- The MAD Scientist Network - Ask-A-Scientist service and huge searchable archive
- MAA Online columns - Columns by Ivars Peterson, Keith Devlin, Frank Morgan, and Alex Bogomolny
- Macalester College Problem of the Week - math problems from email list, also a large archive
- Magic Books - large collection of books on magic with Amazon links
- Magic Squares, Magic Stars & Other Patterns - comprehensive analysis by Harvey Heinz
- Marilyn is Wrong! - Herb Weiner's collection of errors in Marilyn vos Savant's Parade Magazine column, good discussions
- Math Chat - Christian Science Monitor columns by Frank Morgan
- Mathematical Games - nice collection of games, with links for more info
- MatheMUSEments - short pieces by Ivars Peterson
- Math Forum Archive of geometry.puzzles
- The Math in the Movies Page - critical reviews of math in recent movies
- MathLand Archives - Ivars Peterson
- Math Mistakes - Paul Cox' large collection of math mistakes from media, politicians, etc.
- Mathpuzzle.com - lot's of stuff on Ed Pegg's great site!
- The MathSoft Math Puzzle Page
- Math Study Web - lots of links to math sites and software
- Math Trek - Ivars Peterson
- Mensa International
- Merriam-Webster's Word Puzzles
- Microsoft Games - play the beast online, including single player games.
- Mike Keith's World of Words & Numbers - interesting math diversions
- Mike's Puzzle of the Week and MARP Archive
- Millennium Prize Problems - seven unsolved math problems worth $1000000 each to solve!
- The Mind Breakers - puzzles and riddles
- Mind Sports International (MSO) - lots of games and puzzles
- MSO Computer Programming Tournament - Monthly challenge with short work time, no source code
- Mudd Math Fun Facts - interesting math topics from Francis Su at Harvey Mudd College
- Name That Plant - Botany stumpers
- National Geographic GeoBee Challenge - daily geography quiz
- National Puzzlers' League
- Newton Ask-A-Scientist Archive - huge collection of math/science Q&A
- Newton's Apple: Teacher's Guides
- Nick's Mathematical Puzzles - challenging puzzles from Nick Hobson with excellent answers
- Nikora's Puzzles - large collection with short answers
- NGSEC Security Games - hacking stumpers that get hard, you have to register
- NPR Car Talk Weekly Puzzle
- NPR Sounds Like Science Homepage
- NPR Weekend Edition Sunday Puzzle
- NRICH Online Maths Club - new math games and puzzles every month for all ages
- Ole Miss Math Problem of the Week Contest Page - a real contest with calculators for prizes
- Olympiad Math Madness - hard math stumpers
- OMSI Science Whatzit! - science Q&A from Portland
- Pam's Puzzles - good original puzzles for Cybergrrlz (and smart guyz)!
- Paul Bourke's Puzzles - but no answers!
- Peach's Puzzle Page - puzzles from honor students at Governor Livingston High School (but horrible background!)
- The Physics Question of the Week - new feature from the University of Maryland Department of Physics
- Physics Questions - tricky Q&A from the UW-Stout Physics Department
- PhysLink: Ask Experts Your Physics Questions - physics Q&A
- Planetarium - a story-puzzle in weekly instalments, looks slick, I haven't started yet
- Please Pass the Science - science Q&A by Scott Berk, "Simplistic, misleading, and somewhat condescending. . . but never boring!"
- Plus Math and NRICH problem archive - monthly math zine with features and puzzles for smart kids from Cambridge University
- POTM - serious programming challenge, check the past problems and the POTM Message Board
- Powered Parachute Question of the Day - specialized but interesting Q&A
- Primrose Puzzles - new puzzles every week
- Problems of the Week - 6th grade math problems by David J. Picard
- Psychic Stunts - Michael Daniels' neat collection of math tricks and other oddities to explain
- Puzzle Depot
- Puzzle Fun - polyomino puzzles
- Puzzlemaker - make custom mazes, word search, and crossword puzzles online
- Puzzle Museum - collection of classics
- The Puzzle Ring - webring of puzzle sites
- Puzzles by Puzzability - weekly stumpers, word puzzles
- Puzzle Sequences - from Sloane's On-Line Encyclopedia of Integer Sequences
- Puzzles with a Purpose - good original puzzles and discussions mostly by Paul Niquette
- Quirks and Quarks - Real Audio versions (but no transcripts) of Canadian radio show that gets experts to answer interesting science questions
- Ray Hamel's Crossword Puzzles page - puzzles and huge collection of links
- Reality Carnival - fun and bizarre stuff from Cliff Pickover
- The rec.puzzles Archive - great resource!
- Recreational & Educational Computing (REC) - Puzzles and programs by Dr. Michael W. Ecker, including Mathemagical Black Holes
- Riddle (etc) DuJour - stumpers for cash and prizes
- The Riddler - stumpers for cash and prizes
- Rob's Puzzle Pages Archive - another big list of puzzle links
- Rose Hoffmann - Catholic Memorial High School
- Rubik's Puzzles and - Rubik's cubes and lots more, tough stuff
- The Science Corner - Newspaper columns written by Jim Hunt and Nigel Bunce
- Science Fridays and archive - NPR show by Ira Flatow, hours of RealAudio
- The Science Essays of Dr. Ronald DeLorenzo - interesting short essays about chemistry
- "Science Myths" in K-6 Textbooks and Popular culture - from Bill Beaty's Science Hobbyist site
- ScienceNet - huge collection of science Q&A, many of then pleasantly naive.
- Science Netlinks - short science Q&A from AAAS
- Science Playwiths - nice collection of math and science puzzles and activities
- Scientific American: Ask the Experts - science Q&A
- Scott Kim, Puzzle Master - puzzles and products by a master
- Sendafriend Mindbenders - Some remarkable illusions
- Shack's Math Problems - Nice collection of math puzzles with solutions
- The Skinny On... - everyday science column by Hannah Holmes from Discovery.com
- SMARD Puzzles - math puzzles from Australian math teachers group
- SMSU Problem Corner and archives
- The Stone - demo of javascript puzzles
- The Straight Dope - from Cecil Adams, with recent columns. Also check out alt.fan.cecil-adams.
- The Straight Dope Message Boards - comments and questions from the Teeming Millions
- STUMPERS-L and The Wonderful World of Wombats, the unofficial STUMPER-L page - Wombats are real stumpers from reference librarians, huge archive from email group
- Tau Beta Pi Brain Ticklers - tough stumpers from the engineering honor society
- Thinks.Com - 1001 uses for a playful brain
- The Trivia Portal - the raw material for stumpers, you can make your own quizes
- The Truth Tree's Math and Logic Board - it's a competition
- 20,000 Problems Under the Sea - searchable collection of "Math Treasure on the Web"
- Uvarov Bros. Programming Contest - Another tough contest for programmers from Russia, like POTM
- The Ultimate Puzzle Site! - their name
- Unsolved Mathematics Problems - collected by Steven Finch at MathSoft, lots of links
- useless-facts.com - the raw material for stumpers
- USA Mathematical Talent Search (USAMTS) Home Page - tough problems from the NSA!
- USGS Science Challenge Questions and Answers - geology Q&A
- Vandelay Games Word Gamers' Paradise - pen and pencil games and great links
- Weather Corner Archives - good collection of weather articles and Q&A by Jan Null
- Weather Doctor - large collection of interesting articles by Keith Heidorn
- Weatherwise Queries - answers to weather stumpers from NOAA meteorologist Thomas Schlatter
- Web Guide - Mathematical Puzzles
- The Why Files - science behind the news, from the University of Wisconsin
- Wind and Current Puzzles - for sailors
- WonderQuest - USA Today weekly science column by April Holladay, and Archive
- Wood Puzzles - info and links on hand made wood puzzles
- The Word Detective - current word trivia and archive
- Word Play - annotated links to pages about having fun with words
- Word Problems For Kids
- Yahoo! Games server - play games on the web
The Usenet is the real internet - the good, the bad, and the ugly.
Caveat emptor!
Many of these groups get 100s of posts per day, so they're hard to follow on the Web.
I still prefer to use tin in my unix shell account to follow selected groups day by day.
But the Web is handy for browsing.
You can access and search all 30,000+ Usenet groups at
DejaNews.
(RemarQ is no longer available.)
Click on the group name to access your own news server, or click on the [web] link
to read the group from the DejaNews Web server.
Usenet Stumpers:
Last modified .
Copyright © 2003 by Marc Kummel / mkummel@rain.org