Animal matters

Scotland's debate over tests on primates

news.bbc.co.uk

'Wolfman' returns

Explorer Jim McNeill tracks down Arctic wolves

news.bbc.co.uk

Poetry or science?

Is romantic love just a chemical cocktail?

news.bbc.co.uk

Heat may spark world food crisis

Half the world's population could face food crisis by 2100 as soaring temperatures cripple staple crops, scientists warn.

news.bbc.co.uk

First flight of algae-fuelled jet

Continental Airlines is the latest to test fly a jet biofuel, this time with a product derived partially from algae.

news.bbc.co.uk

Baby Jupiter's huge weight gain

The planet Jupiter must have gained mass fast during its infancy, according to astronomers.

news.bbc.co.uk

Holes give edge to new armour

Scientists from the UK Ministry of Defence (MoD) have devised ultra-hard vehicle armour to protect military personnel.

news.bbc.co.uk

Zimbabwe troops 'eat elephants'

A Zimbabwean wildlife campaigner tells the BBC that soldiers are being given elephant meat to eat, as the economic crisis deepens.

news.bbc.co.uk

Everest trip helps critically ill

Blood oxygen levels recorded on a trip by medics to Everest could help the treatment of critically ill patients.

news.bbc.co.uk

Earth Watch

Why it is hard to predict sudden environmental crises

news.bbc.co.uk

Black holes 'preceded galaxies'

Astronomers believe they have solved a cosmic chicken-and-egg question: what came first - black holes or galaxies?

news.bbc.co.uk

Tech fair offers greener vision

Analysts at the Consumer Electronics Show say green credentials of tech products will become critical to success.

news.bbc.co.uk

Mummy of female pharaoh uncovered

Egyptologists find remains of a mummy thought to belong to a queen who ruled 4,300 years ago, Egypt's antiquities chief announced.

news.bbc.co.uk

Mosquitoes make sweet love music

Sexy songs sung by mosquitoes in courtship could be key to curbing the spread of dengue fever, say scientists.

news.bbc.co.uk

Panda bites his third tourist in two years at Beijing zoo

A panda at Beijing zoo bites a man for the third time in two years.

news.bbc.co.uk

Beagle hunter

On a mission to find the most famous ship of science

news.bbc.co.uk

Eat it or lose it - why centuries of crop diversity are at risk

Centuries of crop diversity are at risk of being lost forever as farmers turn to just a few modern, high yielding varieties.

news.bbc.co.uk

US vows 'huge' marine protection

The US is to establish "the largest area of protected sea in the world", banning fishing and mining, around its Pacific islands.

news.bbc.co.uk

Our writers talk back

Some of the previous contributors to the Green Room respond to readers' questions and comments.

news.bbc.co.uk

Canadians claim South Pole record

A trio of Canadians claim a new record for the fastest trek across Antarctica to the South Pole.

news.bbc.co.uk

Feilden's blog

Ground-breaking new technique in stem cell science

news.bbc.co.uk

China alert over bird flu death

Chinese authorities shut down and clean poultry markets in Hebei province, after the first human death in nearly a year.

news.bbc.co.uk

Body repair 'could be ramped up'

A combination of drugs could trick the body into sending its repair mechanisms into overdrive, say scientists.

news.bbc.co.uk

A deep-sea fish caught in the Pacific has mirrors for eyes

A deep-sea fish caught in the Pacific has eyes which use mirrors as well as lenses, scientists discover.

news.bbc.co.uk

Venomous mammal caught on camera

Rare footage of one of the world's most strange and elusive mammals is captured by scientists.

news.bbc.co.uk

 Science > Recreations

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Science > Recreations

Recreations:

The Aesthetics of Symmetry

A brief digression into how people perceive symmetrical patterns -- what makes them boring, interesting, or overly intricate

http://home.earthlink.net/~jdc24/symmetry.htm

Amazing Spiro

An applet for making spirograph graphs. Includes options for size, color and shape. Allows saving of completed image.

http://cgibin.erols.com/ziring/cgi-bin/spiro.pl/spiro.html

Back to Square One

Includes description, solutions and other resources on this cube-like puzzle.

http://www.geocities.com/jaapsch/puzzles/square1.htm

Graand

Free Classified Ads Portal

www.graand.com

Critical Math

Articles and images on recreational math from fractals and magic squares to mathemorchids and Galois.

http://www.gwywyr.com/articles/scimaths/

Cryptarithms Online

70 brain-teasers; a Primer on Cryptarithmetic; books and links to alphametics on the Web.

http://www.geocities.com/Athens/Agora/2160/

CuriousMath

Include news, math tricks, methods, facts, trivia, mostly posted by users.

http://www.curiousmath.com/

David Singmaster: List of Available Material

Teaching and recreational items in this personal collection.

http://anduin.eldar.org/~problemi/singmast/material.html

The Diamond 16 Puzzle

New version of the classic puzzle using row/column/quadrant permutations to display symmetries of graphic designs. Has link to a site on the underlying mathematics (Diamond Theory).

http://finitegeometry.org/sc/16/puzzle/

A Disproof of Pythagoras' Theorem?

A method of disproving the Theorem of Pythagoras is presented. The author is adamant that this is intended only as a puzzle to find the mistake in the arguments, and not as a serious proposal.

http://www.geocities.com/ResearchTriangle/System/8956/problems/pyth.htm

Eric's Scientific Book List: Recreational Mathematics

Book list from Eric Weisstein including titles, authors, publishers, prices, page count and some have links to Amazon.com.

http://www.ericweisstein.com/encyclopedias/books/RecreationalMathematics.html

The Eugène Strens Recreational Mathematics Collection

A special collection at the University of Calgary, including the archives of Martin Gardner. There is a searchable online index.

http://www.ucalgary.ca/lib-old/SpecColl/strens.htm

Eureka

The annual journal of the Archimedeans, the mathematical society of the University of Cambridge. It regularly contains articles on recreational mathematics.

http://www.archim.org.uk/eureka/

Fair Dice

Includes a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures.

http://www.mathpuzzle.com/Fairdice.htm

Famous Curves

Visual animations of famous curves.

http://www.geocities.com/famouscurves/

Fast Arithmetic Tips

Three categories: defensive - know to check an answer, offensive - fast mental calculations, and math magic.

http://www.cut-the-knot.org/arithmetic/rapid/

Fibonacci numbers and the Pascal triangle

The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian.

http://milan.milanovic.org/math/

Final Answers

Numerous facts including formulas, magic tricks, fallacies, recreations compiled by Dr. Gerald P. Michon.

http://home.att.net/~numericana/answer/

Fun With Mathematics

Includes pages on the topics of primes, fibonacci numbers, PI computation, data encryption and links to calculator programs.

http://www.geocities.com/hjsmithh/

Gardner Index

Rough index to the fifteen books containing Martin Gardner's Mathematical Games articles from Scientific American.

http://www.ms.uky.edu/~lee/ma502/gardner5/gardner5.html

Geometric Packing Problems

By Joseph Malkevitch: "Given one shape X how and when can one pack identical copies of this shape into another shape Y?"

http://www.york.cuny.edu/~malk/tidbits/tidbit-geometric-packing.html

HAKMEM

A collection of problems from MIT. Work reported herein was conducted at the Artificial Intelligence Laboratory, a Massachusetts Institute of Technology research program.

http://www.inwap.com/pdp10/hbaker/hakmem/hakmem.html

How To Manually Find A Square Root

The way to do find a square root without a calculator.

http://math.arizona.edu/~kerl/doc/square-root.html

Iamond

A page on polyiamond puzzles. Includes many pages on tessellation.

http://www.mathpuzzle.com/iamond.htm

Jlpe's Number Recreations Page

Features original number recreations by the author, such as generalized perfect numbers, digital diversions, diophantine equations, didactic numbers, and number theory.

http://www.geocities.com/windmill96/numrecreations.html

Look and Say Sequence Generator

Creates a special kind of summation formula created by John Conway.

http://www.btinternet.com/~se16/js/looknsay.htm

MAA Library List in Recreational Mathematics

Book list split into categories. Includes title, author, publisher and date information about each book.

http://www.maa.org/BLL/recmath.htm

MAT 007 I News

A newsletter edited by undergraduates of the Department of Mathematics at the University of Toronto. Includes some online copies.

http://www.math.toronto.edu/007/

Math Forum: 2001 Mathematics Game

A contest that asks to write all integers from 1 to 100 using only the digits 2,0,0,1 and arithmetic operations.

http://mathforum.org/~judyann/2001/

Math Forum: 2002 Mathematics Game

A contest where the contestants have to write all integers from 1 to 100 using only the digits 2,0,0,2 and arithmetic operations.

http://mathforum.org/~judyann/2002/

Math Forum: Algebra Problem of the Week

View this week's algebra problem or those of previous weeks.

http://mathforum.org/algpow/

Math in the Movies

A guide to major motion pictures with scenes of real mathematics.

http://world.std.com/~reinhold/mathmovies.html

Math Magic By Computer

Interactive java puzzles and activities in different mathematical topics.

http://www.cut-the-knot.org/Curriculum/index.shtml#magic

Mathematical Fiction

A list of mathematical fictional movies, books, stories, plays and shows. Split into categories including children's books. Can be sorted by mathematical content and literary quality.

http://math.cofc.edu/faculty/kasman/MATHFICT/

Mathematical Induction

A page of uncommon problems, most closely connected with number theory.

http://www.math.cl/induction.html

Mathematical Lego Sculptures

Designed and built by Andrew Lipson. Images and LDraw files.

http://www.andrewlipson.com/mathlego.htm

Mathematical Problems - Problem Solving

Mathematics Hots (Problems) by Bruno Kevius

http://mathres.kevius.com/problem.html

Mathematical Quotation Server

Furman University Mathematical Quotation Server - random or searchable math quotes.

http://math.furman.edu/~mwoodard/mqs/mquot.shtml

Mathematical Quotation Server

A collection of mathematical quotations culled from many sources. You may conduct a keyword search through the quotation database.

http://math.furman.edu/~mwoodard/mquot.html

Mathematical Spectrum

Mathematical Spectrum is a magazine for students and teachers of mathematics in universities, colleges and schools worldwide. It may be read by anybody interested in mathematics as a recreation.

http://www.apt.group.shef.ac.uk/ms.html

A Mathematician's Aesthetics

In his classic A Mathematician's Apology, G. H. Hardy likened mathematics to poetry and painting. This site elaborates on Hardy's remark with quotations from Stevens, Klee, Fry, and Focillon. Links to related sites are given.

http://finitegeometry.org/sc/ph/aesthetics.html

Mathematics in Art and Architecture

An interdisciplinary course on mathematics in art and architecture.

http://www.math.nus.edu.sg/aslaksen/teaching/math-art-arch.shtml

Mathematics Museum (Japan)

At Mathematics Museum (Japan) you would be surprised how interesting mathematics is. You will find exhibition rooms produced by Japanese researchers and educators.

http://mathmuse.sci.ibaraki.ac.jp/indexE.html

Mathematik

Individual pages on different topics in Mathematics. Examples : group theory, dynamical systems theory, geometry or number theory.

http://www.mathematik.com/

Mathematische Basteleien

Topics include Flexagon, Soma Cube, Pentominos, Cube-it, Rubik's Cube, Froebel's Star, Tangram, House of Santa Claus, Chronogram, Numeric Palindromes, Latticework of Letters. English/German.

http://www.mathematische-basteleien.de/

Mathmos

Includes puzzles, jokes, quotations, poetry, and FAQs.

http://www.mathmos.net/

Maze Classification and Algorithms

A short description of mazes and how to create them. Definition of different mazetypes and their algorithms.

http://www.astrolog.org/labyrnth/algrithm.htm

Mudd Math Fun Facts

An archive of interesting math facts for use in the classroom or just for fun. Browse by subject, difficulty, keywords, or try the "random" feature. Based at Harvey Mudd College.

http://www.math.hmc.edu/funfacts/

Narcissistic Numbers

Those that are representable, in some way, by mathematically manipulating the digits of the numbers themselves.

http://www.geocities.com/~harveyh/narciss.htm

The Nine Digits Page

Puzzles and problems connected with numbers using the digits 1-9.

http://www.worldofnumbers.com/ninedig1.htm

Number Recreations by Shyam Sunder Gupta

Features interesting facts about different numbers. Includes favorite related links.

http://www.shyamsundergupta.com/

On the Puzzles with Polyhedra and Numbers

This is an article on a set of didactical games edited by the Portuguese Mathematical Society (SPM). [PDF]

http://gfm.cii.fc.ul.pt/people/jrezende/jr_poliedros-puzzles_en.pdf

One Metaphor Fits All

Explains Conway's audioactive decay that is generated by a particular kind of sequence. Includes illustrations and related resources.

http://www.btinternet.com/~se16/mhi/

Origami Mathematics

Information on the mathematics of paper folding.

http://www.merrimack.edu/~thull/OrigamiMath.html

Properties of Dice

Polyhedral dice and their properties.

http://hjem.get2net.dk/Klaudius/Dice.htm

Recmath

Includes pages on magic squares and polyomino patterns and contains related java applets.

http://www3.sympatico.ca/diharper/

Recreational Mathematics

Links collected at CAMEL, the Canadian Mathematical Society website.

http://camel.math.ca/Recreation/recreation.html

Recreational Mathematics (David Eppstein)

An extensive list of web resources for recreational math.

http://www.ics.uci.edu/~eppstein/recmath.html

Recreational Mathematics Forum

A forum for posting messages about math recreations. Hosted at Delphi.

http://forums.delphiforums.com/recmath/

Recreational Mathematics Topics

By Steven Dutch. Symmetry, Crystals, Polyhedra and Tilings; Pythagorean triplets and other things about sums of powers; Geometry Classics.

http://www.uwgb.edu/dutchs/RECMATH/recmath.htm

Recreations

Includes a introduction to Roman numerals including a translation of the digits used and a converter which can convert decimal to Roman numerals and vice versa.

http://www.novaroma.org/via_romana/numbers.html

Rubik's Cube Lecture Notes

Notes on the mathematics of the Rubik's cube.

http://web.usna.navy.mil/~wdj/rubik_nts.htm

SimonSingh.net

Home of Simon Singh: author, journalist and TV producer, specialising in science and mathematics. Cryptography is one of his specialties, and his site has a lot of educational and fun content about codes and codebreaking.

http://www.simonsingh.net/

Sir Roger Penrose

An article about him and his interests and contributions to recreational mathematics.

http://www.worldofescher.com/misc/penrose.html

Skytopia - Super Magnet

A colourful world built entirely using mathematical atoms and molecules. Pictures and animations demonstrate structures colliding and interacting. Animated GIF demonstrations.

http://www.skytopia.com/project/magnet/magnet.html

The Sound of Mathematics

Algorithmic music determined by mathematics and by the musical preferences of a human. General MIDI files.

http://www.geocities.com/Vienna/9349/

Spirocharts

A windows application that creates mathematically precise spirograph drawings; savable as images.

http://www.nehuenmultimedia.com.ar/html/spirograph.html

Sportlab

Combines high school and college math topics into sports applications.

http://www.geocities.com/sportlab/

Stunning Friends with Math Magic

A collection of card tricks, number guessing games, paper and glue magic, and other math exercises.

http://www.cut-the-knot.org/arithmetic/rapid/magic.shtml

Table of Numbers Problem

Given a m * n rectangle, place all numbers from 1 to mn that minimizes the sum of the products of rows and columns (both in Spanish and English).

http://www.alpertron.com.ar/CUADRO.HTM

Wade Edward Philpott

Profile and description of his mathematical games and puzzles.

http://www.gamepuzzles.com/wade.htm

Who Can Name the Bigger Number?

An essay by Scott Aaronson on the quest for ever-bigger numbers, from exponentials to Busy Beavers.

http://www.scottaaronson.com/writings/bignumbers.html