{"id":462795,"date":"2026-08-14T02:14:10","date_gmt":"2026-08-14T09:14:10","guid":{"rendered":"https:\/\/climatescience.press\/?p=462795"},"modified":"2026-08-14T02:14:12","modified_gmt":"2026-08-14T09:14:12","slug":"ancient-penguin-fossils-reveal-how-antarctica-shifted-from-warm-forests-to-ice","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=462795","title":{"rendered":"Ancient Penguin Fossils Reveal How Antarctica Shifted from Warm Forests to Ice"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"485\" data-attachment-id=\"462797\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=462797\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?fit=1168%2C784&amp;ssl=1\" data-orig-size=\"1168,784\" data-comments-opened=\"1\" data-image-meta=\"{&quot;credit&quot;:&quot;\\u00fe&quot;,&quot;caption&quot;:&quot;Signature: 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data-image-title=\"0 Ancient Penguin Fossils Reveal How Antarctica Shifted from Warm Forests to Ice\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Signature: 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&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?fit=723%2C485&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?resize=723%2C485&#038;ssl=1\" alt=\"\" class=\"wp-image-462797\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?resize=1024%2C687&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?resize=300%2C201&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?resize=768%2C516&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?resize=640%2C430&amp;ssl=1 640w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?w=1168&amp;ssl=1 1168w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">AI generated by Grok<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Eocene climates<\/strong> (roughly 56\u201334 million years ago) represent a major<strong> transitional phase in Earth\u2019s Cenozoic climate history<\/strong>, shifting from extreme greenhouse (\u201chothouse\u201d\/\u201cwarmhouse\u201d) conditions to the onset of the icehouse world.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Eocene<\/strong> began after the <strong>Paleocene\u2013Eocene Thermal Maximum (PETM, ~56 Ma)<\/strong>, a short, intense hyperthermal event driven by massive carbon release. It then reached peak sustained warmth during the Early Eocene Climatic Optimum (EECO, ~53\u201349 Ma), one of the warmest intervals of the past 65\u2013100 million years. Global mean surface temperatures were typically ~10\u201314 \u00b0C (or more in peak estimates) warmer than pre-industrial levels, with some reconstructions placing EECO global means around 23\u201330 \u00b0C.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key features of the early\u2013middle Eocene greenhouse:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High atmospheric CO\u2082<\/strong> \u2014 Estimates often range from <strong>~500\u20131,600+ ppm <\/strong>(higher during hyperthermals and the EECO peak).<\/li>\n\n\n\n<li><strong>Reduced equator-to-pole temperature gradient<\/strong> \u2014 Tropics were very warm (sea-surface temperatures <strong>sometimes &gt;30\u201335 \u00b0C<\/strong>), while high latitudes were mild (Arctic and Antarctic coastal areas often ice-free or with only limited seasonal ice, supporting forests, including polar forests).<\/li>\n\n\n\n<li><strong>High sea levels <\/strong>\u2014 <strong>Up to ~150 m higher than today<\/strong> due to the lack of large ice sheets.<\/li>\n\n\n\n<li><strong>Wetter conditions<\/strong> in many <strong>regions, with monsoonal influence<\/strong>s and higher precipitation at high latitudes.<\/li>\n\n\n\n<li><strong>Transient hyperthermals<\/strong> (brief extreme warming events) were common in the <strong>early Eocene \u201chothouse\u201d state<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">From the middle to late Eocene, a long-term cooling trend set in. By the late Eocene, climates were still warmer than today but progressively cooler, with increasing seasonality and the first signs of limited ice or glaciers in Antarctica\u2019s highlands. Vegetation shifted from thermophilic (warm-loving) forests toward more cool-adapted or shrubby forms in polar regions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The Eocene\u2013Oligocene Transition (EOT, ~34 Ma)<\/strong> was the pivotal shift from greenhouse to icehouse conditions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rapid global cooling (deep-ocean and surface temperatures dropped several \u00b0C).<\/li>\n\n\n\n<li>Permanent, large-scale Antarctic ice sheets formed (the first major continental ice sheet of the Cenozoic).<\/li>\n\n\n\n<li>Atmospheric CO\u2082 declined significantly (a drop of roughly 40% or ~300+ ppm in key reconstructions is often invoked as the primary driver).<\/li>\n\n\n\n<li>Ocean circulation changes (including progressive opening of Southern Ocean gateways like the Drake Passage) contributed to thermal isolation of Antarctica, but declining CO\u2082 is widely regarded as the dominant trigger.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The EOT marks the boundary between the <strong>\u201cWarmhouse\u201d state<\/strong> (prevailing through most of the Eocene) and the subsequent<strong> \u201cCoolhouse\u201d state<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">During the early Eocene, Antarctica (including the Peninsula region around Seymour Island) experienced warm, humid, <strong>largely ice-free conditions <\/strong>with strong chemical weathering and high terrestrial runoff\u2014consistent with the elevated titanium, silicon, and potassium signals found in early Eocene penguin bones. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By the middle to late Eocene, cooling reduced weathering intensity and terrestrial input. <strong>Permanent ice sheets only became established near the EOT.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In short, the Eocene records Earth\u2019s last major greenhouse climate and the critical transition into the modern icehouse regime dominated by polar ice.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proxy data (isotopes, biomarkers, fossils, and sediments) and climate models continue to refine details of temperatures, CO\u2082 levels, precipitation patterns, and the precise triggers of cooling and glaciation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A new study shows that Eocene penguin fossils from Seymour Island (off the Antarctic Peninsula) preserve chemical records of past climate and environmental change, acting as \u201cchemical archives.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers from China University of Geosciences (Beijing), led by Boyang Xia and colleagues, used non-destructive micro-X-ray fluorescence (\u00b5-XRF) elemental mapping on penguin bones spanning the Eocene (roughly 56\u201334 million years ago).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Seymour Island holds one of the world\u2019s richest and most continuous records of Eocene penguin fossils, covering the shift from relatively warm, humid early Eocene conditions to cooler middle and late Eocene climates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key findings include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Older fossils (~55 million years old, early Eocene) show markedly higher levels of titanium (Ti), silicon (Si), and potassium (K).<\/li>\n\n\n\n<li>These elevated signals are interpreted as reflecting stronger continental (land-based) weathering and greater terrestrial runoff\/sediment input under warmer, wetter conditions.<\/li>\n\n\n\n<li>Younger fossils from cooler intervals have much lower levels of these elements.<\/li>\n\n\n\n<li>Patterns of iron (Fe), manganese (Mn), and sulfur (S) in the bones also record local marine sedimentary and early diagenetic (post-burial chemical) conditions.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The team noted practical challenges in scanning irregular bone surfaces without damage and positioned specimens carefully to minimize artifacts. They conclude that bone geochemistry can complement traditional methods (such as sediment cores and microfossils) for reconstructing Antarctic Peninsula paleoenvironments and weathering history.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The open-access paper, titled \u201cEocene penguin fossils as archives of Antarctic weathering and climate change: insights from micro-X-ray fluorescence elemental mapping,\u201d was published in Fossil Record on 31 July 2026 (DOI: 10.3897\/fr.29.192319). A press release summarizing the work appeared around 12 August 2026.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This builds on the long-known abundance of Eocene penguins (including large species) on Seymour Island during a time when Antarctica was still largely ice-free and more temperate, before major cooling and ice-sheet growth near the Eocene\u2013Oligocene transition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>Eocene penguin fossils as archives of Antarctic weathering and climate change: insights from micro-X-ray fluorescence elemental mapping<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Authors:<\/strong> Boyang Xia et al. (China University of Geosciences, Beijing; key contributors include Huaichun Wu and Quanguo Li).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Journal:<\/strong> Fossil Record 29(2): 575\u2013587<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Publication date:<\/strong> 31 July 2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>DOI:<\/strong> <a href=\"https:\/\/dx.doi.org\/10.3897\/fr.29.192319\" target=\"_blank\" rel=\"noopener\">10.3897\/fr.29.192319<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Provided:<\/strong>\u00a0<a href=\"https:\/\/phys.org\/partners\/pensoft-publishers\/\">Pensoft Publishers<\/a>\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Overview<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This study demonstrates that Eocene penguin bones from Seymour Island (Isla Marambio), off the Antarctic Peninsula, function as chemical archives of past environmental conditions. Using non-destructive micro-X-ray fluorescence (\u00b5-XRF) elemental mapping, the researchers analyzed the distribution of elements in fossil bones spanning the early to late Eocene. These fossils record Antarctica\u2019s transition from warm, humid conditions to a cooler climate, particularly through signals of continental weathering and terrestrial sediment input.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Seymour Island preserves one of the world\u2019s richest and most stratigraphically continuous records of Eocene penguin fossils (from formations such as La Meseta\/Submeseta). These span a key interval of Antarctic climate evolution: relatively warm and humid early Eocene conditions through progressive cooling in the middle and late Eocene, prior to major ice-sheet expansion near the Eocene\u2013Oligocene transition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Methods<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Samples:<\/strong> Fossil penguin bones of varying ages from Seymour Island, compared with extant penguin bones as controls.<\/li>\n\n\n\n<li><strong>Technique:<\/strong> Micro-X-ray fluorescence (\u00b5-XRF) scanning to map elemental composition across bone surfaces without damaging the rare specimens. Irregular and curved bone surfaces posed practical challenges; specimens were positioned as horizontally as possible with a consistent scanning distance to minimize artifacts from surface height variations.<\/li>\n\n\n\n<li><strong>Analysis: <\/strong>Focused on elemental distributions and intensities, interpreted in the context of stratigraphic, sedimentological, and independent palaeoclimatic evidence.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Key Results<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Early Eocene fossils (~55 million years old):<\/strong> Significantly higher levels of titanium (Ti), silicon (Si), and potassium (K).<\/li>\n\n\n\n<li><strong>Younger (middle\/late Eocene) fossils:<\/strong> Much lower signals for these elements.<\/li>\n\n\n\n<li><strong>Interpretation of Ti-Si-K enrichment:<\/strong> Linked to intense chemical weathering on land and heavy terrestrial runoff\/sediment input under warmer, more humid early Eocene conditions. Cooler intervals reduced weathering intensity and land-derived material delivery to the marine environment where the bones were buried. eurekalert.org<\/li>\n\n\n\n<li>Additional patterns of iron (Fe), manganese (Mn), and sulfur (S) reflect local redox conditions and early diagenetic (post-burial) chemical changes in the marine sediments.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The paper\u2019s structure covers elemental distributions in extant vs. fossil penguins, followed by discussion of weathering and element enrichment, the influence of depositional energy, and variations in redox conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Significance and Conclusions<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Penguin bone geochemistry provides a complementary proxy for reconstructing Antarctic Peninsula palaeoenvironments, weathering regimes, and climate change. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can be used alongside traditional approaches such as marine sediment cores and microfossil analysis. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The work highlights how fossils preserve not only biological information but also records of external material inputs, depositional settings, and early diagenesis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This non-destructive approach expands the utility of existing fossil collections for polar palaeoenvironmental research.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the full open-access paper, figures, and supplementary data, see the Fossil Record page linked via the DOI above. A related press release summarizing the findings was issued by Pensoft Publishers around 12 August 2026.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new study shows that Eocene penguin fossils from Seymour Island (off the Antarctic Peninsula) preserve chemical records of past climate and environmental change, acting as \u201cchemical archives.\u201d <\/p>\n<p>The epoch began in extreme warmth and ended with the onset of major Antarctic glaciation. <\/p>\n","protected":false},"author":121246920,"featured_media":462797,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691818328,691829997,691844685,691844689,691844684,691844687,691844690,691844683,691820424,691844686],"class_list":["post-462795","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-antarctic","tag-carbon-dioxide-co","tag-chemical-archives","tag-eocene-climatic-optimum","tag-eocene-penguin-bones","tag-eocene-specimens","tag-eocene-oligocene-transition","tag-micro-x-ray-fluorescence-elemental-mapping","tag-temperatures","tag-weathering-and-climate-change","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1Wor","jetpack-related-posts":[{"id":303796,"url":"https:\/\/climatescience.press\/?p=303796","url_meta":{"origin":462795,"position":0},"title":"PETM Caused by Passing Star?","author":"uwe.roland.gross","date":"02\/22\/2024","format":false,"excerpt":"Paradigms and ruling theories drive scientists to looking for specific answers. And they tend to only see what they \u201cshine a light on.\u201d","rel":"","context":"In \"Climate change\"","block_context":{"text":"Climate change","link":"https:\/\/climatescience.press\/?tag=climate-change"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Fotolia_44604161_Subscription_Monthly_M.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Fotolia_44604161_Subscription_Monthly_M.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Fotolia_44604161_Subscription_Monthly_M.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Fotolia_44604161_Subscription_Monthly_M.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0Fotolia_44604161_Subscription_Monthly_M.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":325078,"url":"https:\/\/climatescience.press\/?p=325078","url_meta":{"origin":462795,"position":1},"title":"Coral Reefs are as Good as Dead, so We Don\u2019t have to Try Anymore?","author":"uwe.roland.gross","date":"04\/30\/2024","format":false,"excerpt":"The adult form of coral is immobile, but\u00a0every year, when conditions are right, coral produces uncounted billions of highly mobile microscopic larvae which seek out new locations to colonise. Coral is continuously probing the boundaries of its range, and establishing new colonies when conditions permit.","rel":"","context":"In \"1.5 degrees Celsius\"","block_context":{"text":"1.5 degrees Celsius","link":"https:\/\/climatescience.press\/?tag=1-5-degrees-celsius"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0-Great-barrier-ref.jpeg?fit=1200%2C698&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0-Great-barrier-ref.jpeg?fit=1200%2C698&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0-Great-barrier-ref.jpeg?fit=1200%2C698&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/04\/0-Great-barrier-ref.jpeg?fit=1200%2C698&ssl=1&resize=700%2C400 2x, 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climate.","rel":"","context":"In \"carbon dioxide (CO\u2082)\"","block_context":{"text":"carbon dioxide (CO\u2082)","link":"https:\/\/climatescience.press\/?tag=carbon-dioxide-co%e2%82%82"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0Distribution-landmasses-regions-seas-middle-ocean-basins.webp?fit=1200%2C734&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0Distribution-landmasses-regions-seas-middle-ocean-basins.webp?fit=1200%2C734&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0Distribution-landmasses-regions-seas-middle-ocean-basins.webp?fit=1200%2C734&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/03\/0Distribution-landmasses-regions-seas-middle-ocean-basins.webp?fit=1200%2C734&ssl=1&resize=700%2C400 2x, 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Short Answer: Yes \u2014 But It\u2019s Complicated.","author":"uwe.roland.gross","date":"04\/05\/2025","format":false,"excerpt":"First, let\u2019s be clear \u2014\u00a0climate change is real\u00a0in the literal sense. The Earth\u2019s climate has been changing for\u00a0billions of years. We have geological records showing periods that were much warmer (like the Eocene, with crocodiles in the Arctic), and much colder (like the Ice Ages that covered North America in\u2026","rel":"","context":"In \"carbon dioxide (CO\u2082)\"","block_context":{"text":"carbon dioxide (CO\u2082)","link":"https:\/\/climatescience.press\/?tag=carbon-dioxide-co%e2%82%82"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/04\/0climatechange-1.jpg?fit=1200%2C799&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/04\/0climatechange-1.jpg?fit=1200%2C799&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/04\/0climatechange-1.jpg?fit=1200%2C799&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/04\/0climatechange-1.jpg?fit=1200%2C799&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/04\/0climatechange-1.jpg?fit=1200%2C799&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2026\/08\/0-Ancient-Penguin-Fossils-Reveal-How-Antarctica-Shifted-from-Warm-Forests-to-Ice.jpg?fit=1168%2C784&ssl=1","_links":{"self":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/462795","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/users\/121246920"}],"replies":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=462795"}],"version-history":[{"count":32,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/462795\/revisions"}],"predecessor-version":[{"id":462832,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/posts\/462795\/revisions\/462832"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=\/wp\/v2\/media\/462797"}],"wp:attachment":[{"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=462795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=462795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/climatescience.press\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=462795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}