# Mathematical Digest

### Short Summaries of Articles about Mathematics

in the Popular Press

"Spinning eggs---a paradox resolved," by H.K. Moffatt and Y. Shimomura. *Nature.*

Mathematicians report "If a hard boiled egg is spun sufficiently rapidlyon a table with its axis of symmetry horizontal, this axis will risefrom the horizontal to the vertical. (A raw egg, by contrast, whensimilarly spun, will not rise.)." Associated Press posted the story"Mathematicians Solve Egg-Spin Mystery," picked up from researchreported in the brief communications section of *Nature:* "Just intime for Easter, mathematicians have cracked the mystery of why ahardboiled egg...whirls like a top."

*--- Annette Emerson*