Provenance Record

Well-structured 748-word News article (within 400-1,200 word range). Good use of sections: overview, discovery timeline, unusual characteristics (inland habitat, crest, teeth), 'hell heron' interpretation, scientific significance, and appropriate unknowns. Professional and clear.

Five sources. science.org DOI (403 — academic journal bot-blocker, not dead; standard primary citation for science journalism). news.uchicago.edu ✅ (institutional press release, primary source, confirmed accessible). npr.org (timeout — free public broadcaster, bot-blocker). phys.org ✅ (confirmed accessible). sciencedaily.com ✅ (confirmed accessible). Three of five sources fully confirmed via manual fetch. Key claims from the two bot-blocked sources independently confirmed by accessible sources.

All key claims verified: Spinosaurus mirabilis (new species name) ✅, Paul Sereno / University of Chicago ✅, 2019 and 2022 expeditions ✅, central Sahara / Niger ✅, 500-1,000 km from nearest ancient sea ✅ (phys.org confirms '500-1,000 km'; UChicago says ~620 miles ≈ 998 km, consistent), scimitar-shaped head crest sheathed in keratin, brightly colored ✅, interlocking/interdigitating teeth adapted for fish ✅, 'hell heron' / wading into ~2 meters of water ✅, inland river habitat alongside long-necked sauropods ✅, CT scanning at Chicago lab ✅, replicas to debut at Chicago Children's Museum ✅, paper published in Science ✅, ~95 million years ago / Cretaceous ✅, first new spinosaurid species in over a century ✅. No hallucinations detected.

Clean, well-verified science news article on a genuinely significant paleontological discovery. Academic journal DOI citation is standard and appropriate. Automated REJECT overridden — bot-blocker pattern on science.org and NPR, not dead links or inaccessible paywalls. Approved for publication.