“As someone pointed out to me, the urination story has, uh, leaked…” – Media Relations, Georgia Tech

Scientific American
Los Angeles Times
Science Friday
National Geograchic

Fun Blogs on us!

Jul. 28, 2014, PTC Product Lifecycle Stories, 6 Ways Nature is Inspiring Human Engineering, Nancy Pardo

Jul. 14, 2014, germiNature, Universal duration in mammals, Daphne Fecheyr-Lippens

Jul. 3, 2014, Medium, Animal Urination– a study in bad science journalism, Joe Turner

Jul. 2, 2014, RunnersWorld, Putting the ‘Pee’ in PR, Mark Remy

Jul. 2, 2014, Mysterious Universe, Fascinating (Not Gross) Fact About Animal Urination, Paul Seaburn

Apr. 15, 2014, PTC Product Lifecycle Stories, Getting Lukewarmer, Roger Yeh

Mar. 24, 2014, Dairy Star Mobile, A myth is now scientific fact,  Jim Linn

Dec. 3, 2013, Branáin – Ravenously Curious, The Law of Urination Revealed, Shawn Radcliffe

Oct. 17, 2013, ShultzScienceBlog, Elucidating the hydrodynamics of urination, David shultz



Oct. 21, 2014, Washington PostWhy a rhino urinates at the same rate as a raccoon — and why that’s useful to know, Jason G. Goldman

Jul. 28, 2014, C&EN, The Law Of Urination, Programmer High Jinks, Lauren Wolf

Jul. 10, 2014, Paper DoridsThe Physics of Pee: Animals Urinate at a Constant Duration Regardless of Size, Mariel Mohns

Jul. 9, 2014, Biomimicry NewsStudy of animal urination could lead to better-engineered products

Jul. 8, 2014, Forbes6 Ways Nature Is Inspiring Human Engineering, Nancy Pardo

Jul. 7, 2014, Real Clear ScienceAll Animals Take Roughly 20 Seconds to Pee

Jul. 7, 2014, Discovery News LetterMost Mammals Take 21 Seconds to Pee, Megan Gannon

Jul. 5, 2014, Tech TimeScientists look into how animals pee and they have a good reason for that, Anu Passary

Jul. 4, 2014, Pansci.tw (Taiwan), 一起來試試「21秒定律」, 火星軍情局

Jul. 3, 2014, Daily Mail (United Kingdom), How long does it take YOU to go? Mark Prigg

Jul. 2, 2014, HNGN, Animal Average ‘Pee Time’ is 21 Seconds, Study finds, Julie S

Jul. 2, 2014, horsetalk.co.nz (New Zealand), Researchers go with the flow in checking out how animals pee

Jul. 2, 2014, Futurity, Big or small, animals take 20 seconds to pee

Jul. 2, 2014, mental floss, Do Larger Animals Take Longer to Pee? Sarah Fecht

Jul. 1, 2014, Before it’s newsProduct Engineering May Draw Inspiration From Animal Pee Study, Gerard LeBlond

Jul. 1, 2014, livescience, Most Mammal Take 21 Seconds to Pee, Megan Gannon

Jul. 1, 2014, RedOrbit, Product Engineering May Draw Inspiration From Animal Pee Study,  Gerard LeBlond

Jul. 1, 2014, ZeeNews (India), Law of urination: It takes 20 seconds to pee!

Jul. 1, 2014, Counsel&HealStudy of Animal Urination Might Lead To Better-Engineered Products, Study Suggests, Kamal Nayan

Jul. 1, 2014, The Financial ExpressLaw of urination: It takes 20 seconds to pee!

Jul. 1, 2014, Laboratory Equipment,  Study of Animal Urination Inspires New Products

Jul. 1, 2014, Ru FactsPhysicists have amended their outdoor “The law of urination”

Jun. 30, 2014, Science2.0Better Engineering Through Urine – You’re Welcome, Isaac Newton

Jun. 30, 2014, NBC News, Thanks to Gravity, Large Mammals All Take 21 Seconds to Pee

Jun. 30,2014, ScienceDailyStudy of animal urination could lead to better-engineered products

Jun. 30, 2014, KMBZUrination Times of Mammals Strikingly Similar

Jun. 30, 2014, TheRegister, True fact: Your CAT wees … like a racehorse

Jun. 30, 2014, NewswiseStudy of Animal Urination Could Lead to Better-Engineered Products

Jun. 30, 2014, EurekAlert!Study of animal urination could lead to better-engineered products

Jun. 30, 2014, Georgia Tech NewsStudy of animal urination could lead to better-engineered products, Jason Maderer

Jun. 27, 2014, Guokr (China), 严肃点,这是尿尿的流体力学, Paradoxian

Jun. 26, 2014, The NewserStudy: Mammals Big, Small Pee in About 21 Seconds, Elizabeth Armstrong Moore

Jun. 26, 2014, The WeekResearchers find that most mammals, big and small, need 21 seconds to urinate

Jun. 26, 2014, South China Morning Post, It’s a pee coup: scientists find most animals take 21 seconds to urinate, McClatchy-Tribune

Jun. 26, 2014, Medical Daily, Go With The Flow: Nearly All Mammals, Humans Included, Need 21 Seconds To Urinate, Samantha Olson

Jun. 26, 2014, Phys.orgUrination duration: Study finds most mammals need about 21 seconds

Jun. 25, 2014, Scientific American, 21-Second Rule Governs Mammal Micturition, Karen Hopkin

Jun. 25, 2014, LA Times, Urination duration: Study finds most mammals need about 21 seconds, Amina Khan

Jun. 25, 2014, Science, Large animals are no whiz at peeing, Xochitl Rojas-Rocha

Jun. 24, 2014, Spiegel Online (Germany), Säugetier-Studie: Urinieren dauert bei allen Arten ähnlich lang

Jan. 23, 2014, Deutschlandradio (Germany), Law of Urination, Rico Rau

Jan. 13, 2014, Smart Enough to Know (United Kingdom), Episode 59 [at 8:22]



  • United States

Nov. 15, 2013, NPR Science FridayThe Other Golden Rule, Flora Lichtman

Oct. 22, 2013, Discovery News, All Mammals Obey Law of Urination (Video)

  • International

Oct. 26, 2013, CBC Radio-Canada (Canada), The Law of Urination, Jim Lebans


  • United States

Nov. 7, 2013, Nature World NewsWhen Nature Calls, Size Matters, New Research on Peeing Suggests

Nov. 7, 2013, USNewsThe Tao of Pee: The Science Behind Urination, LouanneJenson

Nov. 7, 2013, Science DailyThe Tao of Pee: The Science Behind Urination

Nov. 7, 2013, APS Public Release, The tao of pee, Jason Bardi

Oct. 24, 2013, Web Pro NewsUniversal Law of Urination: 21 Seconds, Mike Fossum

Oct. 24, 2013, Business InsiderAll Mammals Empty Their Bladders In The Same Amount Of Time, Shaunacy Ferro

Oct. 22, 2013, National Geographic DailyNew Law of Urination: Mammals Take 20 Seconds to Pee,  Carrie Arnold

Oct. 22, 2013, MiniPostIs there a mammalian ‘law of urination’?,  Susan Perry

Oct. 21, 2013, abcNEWSEveryone Poops. And Everyone Takes 21 Seconds To Pee (PDF), Liz Neporent

Oct. 21, 2013, The AwlIgnorance Of The Law Of Urination Is No Excuse (PDF), Alex Balk

Oct. 21, 2013, Global PostMammals big and small take 21 seconds to pee, says study (PDF), Alexander Besant

Oct. 21, 2013, Science RecorderScientists discover the ‘universal law of urination’ (PDF), Ellen Miller

Oct. 20, 2013, KpopStarzNew Golden Rule: Every Mammal Takes 21 Seconds To Urinate, Scientists Discover (PDF)

Oct. 19, 2013, USA NewsMammals Pee For Same Duration Of 21 Seconds, Urination Study Finds (VIDEO) (PDF), Charles Catania

Oct. 19, 2013, Before It’s NewsRegardless Of Bladder Size, All Mammals Subject To The ‘Law Of Urination’ (PDF)

Oct. 19, 2013, The VergeThe Law of Urination: mammals take 21 seconds to pee (PDF),  Amar Toor

Oct. 19, 2013, DailyMailIt takes 21 seconds to go: Scientists discover that all mammals urinate for roughly the same length of time (PDF), Steve Nolan

Oct. 19, 2013, Nature World NewsAll Mammals Follow the Law of Urination, Researchers Find [Video] (PDF)

Oct. 19, 2013, RedOrbitRegardless of bladder size, all mammals subject to the ‘law of urination’ (PDF)

Oct. 18, 2013, Popular ScienceHow Fast Does An Elephant Pee? (PDF), Shaunacy Ferro

Oct. 18, 2013, Physics Central (blog)When You Gotta Go, You Gotta Go . . . for about 21 Seconds (PDF)

Oct. 18, 2013, Scientific American (blog)Canine Urination 101: Handstands and Leg Lifts Are Just the Basics (PDF), Julie Hecht

Oct. 18, 2013, io9Shocking discovery: All mammals take about 21 seconds to go pee (PDF)

Oct. 18, 2013, GristEvery mammal on Earth takes an average 21 seconds to pee (PDF), Sarah Laskow

Oct. 18, 2013, Smithsonian (blog)There’s a Universal Law of Urination in Mammals (PDF), Rose Eveleth

Oct. 18, 2013, The Blaze21 Seconds: How long scientists found it takes all mammals to do this (PDF), Liz Klimas

Oct. 18, 2013, NewserScientists Come Up With ‘Law of Urination’ (PDF), Neal Colgrass

Oct. 18, 2013, Houston Chronicle (blog)Scientists find a “Law of Urination” (PDF), Eric Berger

Oct. 18, 2013, Atlanta Journal Constitution (blog)Georgia Tech physicists visit Zoo Atlanta, walk out with ‘Law of Urination’ (PDF), Jim Galloway

Oct. 18, 2013, University HeraldLaw Of Urination In Mammals, Could Help Treat Urinary Disorders (PDF), Scott Bickard

Oct. 18, 2013, HNGN‘Law Of Urination’ Shows Most Mammals Take 21 Seconds To Pee (VIDEO) (PDF), Rebekah Marcarelli

Oct. 18, 2013, Huffington PostMammals Pee For Same Duration Of 21 Seconds, Urination Study Finds (VIDEO), Ron Dicker

Oct. 18, 2013, Huffington PostThe ‘Law Of Urination’: Elephants Pee As Quickly As Rats (PDF)

Oct. 18, 2013, Raw StoryMathematicians discover universal law of mammal urination (PDF), David Ferguson

Oct. 17, 2013, Discover (blog)Regardless of bladder size, all mammals pee for approximately 21 seconds (with video goodness). (PDF)

Oct. 17, 2013, Neatorama, The Law of Urination: Mammals Urinate for the Same Duration, John Farrier

Oct. 14, 2013, arXiv, Law of Urination: all mammals empty their bladders over the same duration (Video)

Oct. 13, 2013, Improbable ResearchBirth-Fluid Dynamics, and the Splashy Hydrodynamics of Urination (PDF), Aatish Bhatia

  • International

20131107, Chongqing Daily (China), 小便定律:尿一次耗时21秒最合理

20131107, eNorth (China), 哺乳动物皆遵循排尿定律:一次排尿过程需要21秒

20131105, Sina (HongKong), 科學家提出哺乳動物21秒「排尿定律」

20131105, 365 Ji Lin (China), 科学家发现“小便定律”尿一次花21秒最合理

20131104, People (China), 研究揭小便定律:尿一次耗时21秒最合理

20131031, CN Yes News (China), 科學家提出哺乳動物21秒“排尿定律”, 任天

20131030, ZhengJian (China), 研究顯示所有哺乳動物都遵循21秒排尿定律

20131030, Pop Yard (China), 美国科学家提出哺乳动物21秒“排尿定律”

20131028, Xin Hua Net (China), 所有哺乳動物遵循21秒排尿定律?

20131027, ASTV (Thailand), “กฏของการฉี่” เล็ก-ใหญ่ใช้เวลาเท่ากัน 21 วิ

20131023, Zibo Sky (China), 小便也有“定律” 哺乳动物尿尿时间都是21秒, 建平

20131023, World People News「小便定律」哺乳類動物小便時間21秒, 鄒弘

20131023, News China (China), 科學家發現哺乳動物“排尿定律” 時間都為21秒, 葉于路

20131022, ChinaNews (China), 小便也有“定律” 哺乳动物尿尿时间都是21秒, 建平

20131021, Gizmodo UK (United Kingdom), “Law of Urination” Is a Real Thing, Says Science (PDF), Chris Mills

20131021, The Times (United Kingdom), Why answering the call of nature is all in the timing (PDF), Tom Whipple

20131021, Vanguardia (Mexico), Descubren regla universal entre mamíferos: tardamos 21 segundos en orinar

20131021, La Tercera (Chile), Estudio dice que los mamíferos se demoran en promedio 21 segundos en orinar 

20131021, lianformacion (Spain), La ley de la micción: los animales tardan unos 21 segundos en orinar, sea cual sea su tamañoAntonio Martínez Ron

20131021, Kaixian TV (China), 美专家说人类小便需要21秒 (PDF), 朱蕾

20131021, Apple (Hong Kong), 大小哺乳類動物一樣 小便定律每次21秒 (PDF)

20131020, Common Post (Japan), あなたも私もおしっこの時間は21秒!!全哺乳類の放尿時間が21秒である「排尿の法則」が発見される!! , キルロイ

20131020, Altijd Opmerkelijk Nieuws (Netherland), Dieren plassen zo’n 21 seconden (PDF)

20131020, etnews (Korea), 배뇨의 황금률 발견 “모든 포유류는 평균 21초” (PDF)

20131020, iFeng (China), 科学家发现哺乳动物“小便定律” 

20131020, Now News (Taiwan), 美研究「小便定律」…哺乳類動物排尿時間皆為21秒 (PDF)

20131020, Sharp Daily (Hong Kong), 科學家研究小便定律 哺乳類動物平均去21秒

20131019, ETToday (Taiwan), 美研究「小便定律」:哺乳動物的尿尿時間都是21秒 (PDF)

20131019, Apple Daily (Taiwan), 「尿尿定律」哺乳類噓噓 都需21秒 (PDF), 簡竹君

20131018, Вести.Ru (Russia), У млекопитающих действует единый “закон мочеиспускания”, Маргарита Паймакова

20131017, New Scientist (United Kingdom), Universal law of urination found in mammals (PDFVideo), Jacob Aron, Magazine Issue 2940 (20131023)