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A curated encyclopedia of the natural world and human history.

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paleontology The Burgess Shale The Burgess Shale is a Middle Cambrian (~508 Ma) fossil deposit in the Canadian Rockies of British Columbia that preserves an extraordinary assemblage of over 200 marine species with exceptional soft-tissue detail, providing an unparalleled window into the rapid diversification of animal life during the Cambrian explosion.
human evolution Evolution of throwing Humans are the only species capable of high-speed, accurate overhand throwing, a capacity that depends on a suite of derived anatomical features in the shoulder, waist, and wrist that together enable elastic energy storage and rapid release at ball velocities exceeding 40 metres per second.
the bible The empty tomb The empty tomb narrative first appears in Mark 16:1–8, written around 70 CE, and is notably absent from Paul's earlier letters, leading scholars to debate whether it reflects an early historical tradition or a later legendary development.
paleontology Ankylosaurs Ankylosauria was a clade of heavily armored herbivorous dinosaurs within Thyreophora that ranged from the Early Jurassic to the end of the Cretaceous, achieving a near-global distribution across both Laurasia and Gondwana, with their bodies sheathed in osteoderms that formed an extensive dermal shield unmatched by any other vertebrate group.
human evolution Thermoregulation and hair loss Humans are uniquely hairless among primates, a trait most likely driven by natural selection for enhanced thermoregulation as early hominins adopted upright postures and endurance activities in open, sun-exposed environments beginning roughly 1.5 to 2 million years ago.
paleontology Transitional fossils Transitional fossils are organisms that display anatomical features intermediate between two major groups, providing direct physical evidence of the step-by-step nature of evolutionary change documented across hundreds of lineages.