Mathematics and science journalist. My work has appeared in Quanta, Nature, The Atlantic, New Scientist, Science News and other publications.https://bsky.app/profile/ericaklarreich.bsky.socialhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3mk3xeixduk2wMathematicians have figured out how to assign each knot a hexagonal "QR code" that is as symmetric and delicately detailed as a snowflake -- my latest for @quantamagazine.bsky.social #MathSky https://www.quantamagazine.org/a-powerful-new-qr-code-untangles-maths-knottiest-knots-20260422/22 Apr 2026 16:50 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3mk3xeixduk2whttps://bsky.app/profile/ericaklarreich.bsky.social/post/3mhiuuhsszk2lExcited to learn that my Quanta article about the Noperthedron will appear in The Best American Science and Nature Writing! Many thanks to guest editor @xkcd.com + @jaimealyse.bsky.social, Mariner Books, @jordanacep.bsky.social and @quantamagazine.bsky.social https://www.quantamagazine.org/first-shape-found-that-cant-pass-through-itself-20251024/20 Mar 2026 15:54 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3mhiuuhsszk2lhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3m3xg3smkms2zMy latest for @quantamagazine.bsky.social is about a geometry problem devised more than three centuries ago by King Charles I's nephew, Prince Rupert of the Rhine, leader of the Royalist forces in the English Civil War. https://www.quantamagazine.org/first-shape-found-that-cant-pass-through-itself-20251024/24 Oct 2025 17:38 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3m3xg3smkms2zhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3ltkvxu2ktc2lA new paper has forced a reckoning on cryptographers by showing how to harness a widely used proof technique to "prove" lies -- my latest for @quantamagazine.bsky.social https://www.quantamagazine.org/computer-scientists-figure-out-how-to-prove-lies-20250709/09 Jul 2025 22:56 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3ltkvxu2ktc2lhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3logtwjdvgk2fSome dimensions are weirder than others! In a new proof, mathematicians have shown that a certain kind of strangely twisted shape can exist only in dimensions 2, 6, 14, 30, 62 and 126. My latest for Quanta Magazine: https://www.quantamagazine.org/dimension-126-contains-strangely-twisted-shapes-mathematicians-prove-20250505/05 May 2025 17:03 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3logtwjdvgk2fhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3lm5uwhvmys2gDennis Gaitsgory just won the $3 million Breakthrough Prize in mathematics; here's my deep dive from last year into his masterwork: https://www.quantamagazine.org/monumental-proof-settles-geometric-langlands-conjecture-20240719/06 Apr 2025 16:36 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3lm5uwhvmys2ghttps://bsky.app/profile/ericaklarreich.bsky.social/post/3lfanqq7khk2a"A proof that Riemann missed" -- my latest for @quantamagazine.bsky.social addresses an age-old question: which numbers are irrational? https://www.quantamagazine.org/rational-or-not-this-basic-math-question-took-decades-to-answer-20250108/08 Jan 2025 17:09 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3lfanqq7khk2ahttps://bsky.app/profile/ericaklarreich.bsky.social/post/3l6ikyffkv32oHector Pasten didn't want to write an exam for his students, so he procrastinated by thinking about a nearly century-old problem about prime factors--and solved it! My latest for @quantamagazine.bsky.social #MathSky https://www.quantamagazine.org/big-advance-on-simple-sounding-math-problem-was-a-century-in-the-making-20241014/14 Oct 2024 18:45 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3l6ikyffkv32ohttps://bsky.app/profile/ericaklarreich.bsky.social/post/3l2uq7siofh2jIf you haven't encountered @littmath.bsky.social's probability puzzles on the other site, here's your chance to! My latest for @quantamagazine.bsky.social #MathSky https://www.quantamagazine.org/perplexing-the-web-one-probability-puzzle-at-a-time-20240829/29 Aug 2024 17:10 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3l2uq7siofh2jhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3kxnnq4kfri2eIn a "crowning achievement," mathematicians have proved a major part of the profound mathematical vision called the Langlands program -- my latest for @quantamagazine.bsky.social #MathSky https://www.quantamagazine.org/monumental-proof-settles-geometric-langlands-conjecture-20240719/19 Jul 2024 17:21 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3kxnnq4kfri2ehttps://bsky.app/profile/ericaklarreich.bsky.social/post/3kp3p6hjn2d2fMathematicians have made the first substantial progress in 80 years on understanding points in the plane that are integer distances apart -- my latest for @quantamagazine.bsky.social #MathSky https://www.quantamagazine.org/merging-fields-mathematicians-go-the-distance-on-old-problem-20240401/01 Apr 2024 18:37 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3kp3p6hjn2d2fhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3kkrqeotpkl2dA Chicago computer scientist has made the first substantial progress in 50 years on a fundamental question in algebra: how to recognize when two groups are the same. My latest for @CACMmag: https://cacm.acm.org/magazines/2024/2/279521-algorithmic-advance-the-group-isomorphism-problem/fulltext06 Feb 2024 21:51 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3kkrqeotpkl2dhttps://bsky.app/profile/ericaklarreich.bsky.social/post/3kcobodijti2jMathematicians are "breathing new life into analytic number theory" by understanding how quickly buckets full of prime numbers start to even out -- my latest for @quantamagazine.bsky.social https://www.quantamagazine.org/a-new-generation-of-mathematicians-pushes-prime-number-barriers-20231026/26 Oct 2023 17:29 +0000at://did:plc:mwejmk2i2qdfwdv3lcx3jjfd/app.bsky.feed.post/3kcobodijti2j