{"id":324950,"date":"2026-03-06T12:15:08","date_gmt":"2026-03-06T12:15:08","guid":{"rendered":"https:\/\/www.newsbeep.com\/il\/324950\/"},"modified":"2026-03-06T12:15:08","modified_gmt":"2026-03-06T12:15:08","slug":"water-bears-on-mars-tardiguardians-of-the-galaxy","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/il\/324950\/","title":{"rendered":"Water bears on Mars: Tardiguardians of the Galaxy?"},"content":{"rendered":"

\"WaterArtist\u2019s concept of a tardigrade<\/a>, or water bear, floating in space. These creatures are small, about the size of the period at the end of this sentence. But a\u00a0new study says water bears might\u00a0help future astronauts adapt to and survive on Mars \u2026 or elsewhere beyond Earth. That\u2019s why they\u2019re calling them Tardiguardians of the Galaxy. Image via Terranaut\/ Pixabay<\/a>.<\/p>\n

Tardigrades \u2013 also known as water bears \u2013 are tiny animals about 1 mm or less in size. They\u2019re known for being able to survive in extreme environments.
\nTardigrades can survive in simulated Martian regolith, researchers found \u2026 if you rinse it with water first.
\nFuture astronauts could use tardigrades to help grow plants and survive in habitats on Mars.<\/p>\n

Tardiguardians of the Galaxy<\/p>\n

You\u2019ve probably heard of tardigrades<\/a> \u2013 commonly known as water bears \u2013 microscopic creatures that look like chubby, cute bears. A new study from researchers in the U.S., Poland and the U.K. shows how these critters might help future astronauts survive on Mars. The researchers said<\/a> on February 27, 2026, that tardigrades could survive in Mars\u2019 regolith and help grow plants in Martian greenhouses. The regolith would simply need to be washed with water first.<\/p>\n

The study shows how humans can use tardigrades to help us adapt extraterrestrial resources to support the exploration of Mars or other locations in the solar system. It suggests tardigrades might also be able to help protect against contaminants that human astronauts would bring with them.<\/p>\n

The researchers proposed a fun nickname for these tiny creatures: Tardiguardians of the Galaxy.<\/p>\n

They published<\/a> their peer-reviewed<\/a> study in the International Journal of Astrobiology on December 5, 2025.<\/p>\n

\"7View larger<\/a>. | These images show active tardigrades on Earth (top row) and in the Mars simulation (bottom row). The arrows point to mineral interactions. Image via Corien Bakermans\/ Penn State<\/a>.
\nWater bears on Mars<\/p>\n

Mars is covered in regolith \u2013 loose, rocky debris and dust \u2013 instead of regular soil as we think of it on Earth. With this in mind, the researchers created two kinds of simulated Martian regolith. Both of them were based on regolith seen by the Curiosity rover at Rocknest in Gale Crater. The first one, MGS-1, represented the regolith on Mars in general. The second, OUCM-1, was more specific to the Rocknest location.<\/p>\n

The researchers added living tardigrades to each simulant. They kept an eye on the tiny creatures using microscopes. Surprisingly, the first simulant affected the tardigrades much more than the second one. In fact, the tardigrades no longer showed any activity after only two days of exposure to the simulant. Altoona Professor of Microbiology Corien Bakermans<\/a> at Penn State is the first author of the new paper. She said<\/a>:<\/p>\n

We know a lot about bacteria and fungi in simulated regolith, but very little about how they impact animals, even microscopic animals, like tardigrades. We investigated the specific, isolated impact of the regolith on tardigrades.<\/p>\n

For the MGS-1 simulant, we saw significant inhibition \u2013 reduced activity \u2013 within two days. It was very damaging compared to OUCM-1, which was still inhibitory but much less so.<\/p>\n

\"WomanCorien Bakermans<\/a> is the Altoona Professor of Microbiology at Penn State. She is the 1st author of the new study about tardigrades<\/a> on Mars. Image via Penn State<\/a>.<\/p>\n

Short-term Survival Of Tardigrades In Martian Regolith Simulantsastrobiology.com\/2026\/02\/shor\u2026 #astrobiology #Tardigrade #Mars<\/p>\n

\u2014 Astrobiology (@astrobiology.bsky.social)<\/a> 2026-02-28T18:46:07.886Z<\/a><\/p>\n

Just add water<\/p>\n

Why was the first simulant more damaging than the second one? Was there some kind of toxic chemical that killed the tardigrades? If so, the researchers suggested that perhaps it was something that could simply be washed off with water. Bakermans said:<\/p>\n

We were a little surprised by how damaging MGS-1 was. We theorized that there might be something specific in the simulant that could be washed away.<\/p>\n

To test this idea, the research team rinsed the simulant with water. They then added new tardigrades. And surprise \u2026 the tardigrades survived! There was almost no reduction in their activity. The researchers\u2019 hunch seemed to be correct, Bakermans noted:<\/p>\n

It seems that there\u2019s something very damaging in MGS-1 that can dissolve in water, maybe salts or some other compound. That was unexpected, but it\u2019s good in a sense, because it means that the regolith\u2019s defense mechanism could stop contaminants. At the same time, it can be washed to help support plant growth or prevent damage to humans who come in contact with it.<\/p>\n

\"AstronautsView larger<\/a>. | Concept of a future human base on Mars. With help from tardigrades, plants could grow in Martian greenhouses. Image via NASA<\/a>.
\nFuture astronauts and water bears on Mars<\/p>\n

The results show that water bears could help future astronauts survive on Mars. The tardigrades would be useful for growing plants in the Martian regolith, in a contained greenhouse though, of course. And the toxic regolith on its own \u2013 without water bears added \u2013 would help defend against contamination by earthly microbes that might have hitched a ride on the astronauts.<\/p>\n

The paper cautions that more study is need though, saying<\/a>:<\/p>\n

These experiments have ramifications for the choice of species for functional soils to support plants and humans on Mars and for the limitations of terrestrial life; however, more testing is necessary to fully understand the potential habitability and dangers of Martian regolith.<\/p>\n

Bottom line: Scientists at Penn State said tiny water bears on Mars could help future astronauts survive there. They nicknamed them Tardiguardians of the Galaxy.<\/p>\n

You deserve a daily dose of good news. For the latest in science and the night sky, click here to subscribe to our free daily newsletter.<\/a><\/p>\n

Source: Short-term survival of tardigrades (Ramazzottius cf. varieornatus and Hypsibius exemplaris) in martian regolith simulants (MGS-1 and OUCM-1)<\/a><\/p>\n

Via Penn State<\/a><\/p>\n

Read more: Why NASA sent tiny water bears into space<\/a><\/p>\n

Read more: Did these tardigrades survive crash-landing on the moon?<\/a><\/p>\n

Paul Scott Anderson
\n View Articles<\/a><\/p>\n

About the Author:<\/p>\n

Paul Scott Anderson has had a passion for space exploration that began when he was a child when he watched Carl Sagan\u2019s Cosmos. He studied English, writing, art and computer\/publication design in high school and college. He later started his blog The Meridiani Journal in 2005, which was later renamed Planetaria. He also later started the blog Fermi Paradoxica, about the search for life elsewhere in the universe.
\n
\nWhile interested in all aspects of space exploration, his primary passion is planetary science and SETI. In 2011, he started writing about space on a freelance basis with Universe Today. He has also written for SpaceFlight Insider and AmericaSpace and has also been published in The Mars Quarterly. He also did some supplementary writing for the iOS app Exoplanet.
\n
\nHe has been writing for EarthSky since 2018, and also assists with proofing and social media.<\/p>\n","protected":false},"excerpt":{"rendered":"Artist\u2019s concept of a tardigrade, or water bear, floating in space. These creatures are small, about the size…\n","protected":false},"author":2,"featured_media":324951,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[1744,85,46,141,145,12852,160946,160945],"class_list":{"0":"post-324950","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-earth","9":"tag-il","10":"tag-israel","11":"tag-science","12":"tag-space","13":"tag-tardigrades","14":"tag-tardiguardians-of-the-galaxy","15":"tag-water-bears-on-mars"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/324950","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/comments?post=324950"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/324950\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media\/324951"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media?parent=324950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/categories?post=324950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/tags?post=324950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}