--- title: Google Doodle Honors Blood Group Discoverer Karl Landsteiner description: The Austrian-American biologist Karl Landsteiner, in 1901, discovered the four blood types — A, B, AB and O canonical: https://time.com/4367773/google-doodle-karl-landsteiner-discover-blood-groups/ author: TIME Staff article:opinion: false article:content_tier: free article:published_time: 2016-06-14T04:19:13.000Z article:modified_time: 2026-04-13T07:33:19.387Z og:title: New Google Doodle Honors Biologist Karl Landsteiner og:description: He is credited with discovering the existence of blood groups og:url: https://time.com/4367773/google-doodle-karl-landsteiner-discover-blood-groups/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt5c95f35537342d49/698897b4a988caba426b8398/screen-shot-2016-06-14-at-11-34-39-am.png?branch=production&width=428&quality=75&auto=webp&crop=16:9 og:image:width: 428 og:image:height: 241 og:image:alt: Screen Shot 2016-06-14 at 11.34.39 AM og:type: article twitter:card: summary_large_image twitter:title: New Google Doodle Honors Biologist Karl Landsteiner twitter:description: He is credited with discovering the existence of blood groups twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt5c95f35537342d49/698897b4a988caba426b8398/screen-shot-2016-06-14-at-11-34-39-am.png?branch=production&width=428&quality=75&auto=webp&crop=16:9 ---  # New Google Doodle Honors Karl Landsteiner, Discoverer of Blood Groups > Sponsored content. 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Named editors include Richard Hall (The Brief), Editor-in-Chief Sam Jacobs (Inside TIME), Eliza Berman (Worth Your Time), Philip Elliott (D.C. Brief), Justin Worland (Future Proof) and Harry Booth (In the Loop). Health Matters is written by TIME's health desk. #### How do I sign up for a TIME newsletter? Go to time.com/newsletters, choose the newsletters you want and enter your email address. There is no cost and no subscription requirement. by [TIME Staff](https://time.com/author/time-staff/) ## TIME Staff Jun 14, 2016 4:19 AM UTC  Google Doodle honoring Karl Landsteiner Google Doodle honoring Karl Landsteiner Google by [TIME Staff](https://time.com/author/time-staff/) ## TIME Staff Jun 14, 2016 4:19 AM UTC Karl Landsteiner, the subject of Tuesday’s [Google Doodle](https://www.google.com/doodles/karl-landsteiners-148th-birthday), may not be a household name, but his work helps save millions of lives every day. The Austrian-American biologist, in 1901, discovered the four blood types — A, B, AB and O — leading to the first-ever blood transfusion six years later. Landsteiner also collaborated with scientist Erwin Popper to lay the foundation that led to the discovery of the poliovirus, thus enabling the treatment of a disease that afflicted millions of children. “On what would be his 148th birthday, we thank you, Karl Landsteiner, for helping us lead longer, healthier lives,” Google said in a statement. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4367773/google-doodle-karl-landsteiner-discover-blood-groups/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4367773/google-doodle-karl-landsteiner-discover-blood-groups/"},"headline":"New Google Doodle Honors Karl Landsteiner, Discoverer of Blood Groups","datePublished":"2016-06-14T04:19:13.000Z","dateModified":"2026-04-13T07:33:19.387Z","description":"On what would have been his 148th birthday","url":"https://time.com/4367773/google-doodle-karl-landsteiner-discover-blood-groups/","keywords":["Newsfeed","Google Doodle"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt5c95f35537342d49/698897b4a988caba426b8398/screen-shot-2016-06-14-at-11-34-39-am.png?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"TIME Staff","jobTitle":null,"url":"https://time.com/author/time-staff/"}],"articleSection":"","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt5c95f35537342d49/698897b4a988caba426b8398/screen-shot-2016-06-14-at-11-34-39-am.png?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"Screen Shot 2016-06-14 at 11.34.39 AM","caption":"google doodle karl landsteiner","creditText":"Google","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/tag/time-section-newsfeed/","name":"Newsfeed"}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/4367773/google-doodle-karl-landsteiner-discover-blood-groups/","name":"New Google Doodle Honors Karl Landsteiner, Discoverer of Blood Groups"}}]}] ```