Arctic landmass emergence and climate feedbacks enabled dinosaur radiation during Late Triassic-Early Jurassic
Original framing: “Giant Arctic continent launched dinosaurs to world domination” — New Scientist
The Arctic landmass’s emplacement during the Late Triassic (201-174 Ma) coincided with a 5-10°C global cooling event, as evidenced by oxygen isotope records from marine sediments. Silicate weathering of the newly exposed landmass sequestered CO₂, while increased albedo from snow/ice cover amplified cooling—mechanisms confirmed by climate models. The fragmentation of Pangaea’s equatorial megacontinent reduced competition, allowing small, endothermic archosaurs to radiate. However, the headline’s causal framing ('launched to world domination') overstates determinism; contingency (e.g., asteroid impacts) and ecosystem feedbacks also played roles.
The Late Triassic-Early Jurassic transition reveals a tectonic-climate coevolutionary cascade where the emplacement of an Arctic landmass triggered global cooling via silicate weathering and albedo shifts, fragmenting Pangaea’s megacontinent and creating refugia for small, warm-blooded archosaurs.
This narrative, however, is a Western-centric simplification: Indigenous ontologies (e.g., Māori *whenua*, Yoruba *Ifá*) frame the landmass as a living ancestor whose agency shaped biodiversity, while Global South paleontologists document Gondwanan radiations that challenge Northern Hemisphere determinism. The trickster’s laughter (Hermes, Coyote) exposes the absurdity of framing dinosaur 'dominion' as inevitable—when in reality, it was a contingent gift from the land itself. Modern parallels abound: Arctic warming today mirrors this deep-time cascade, but our extractive industries (fossil fuels, mining) now act as the true 'architects' of climate change. Solution pathways must therefore center decolonization (restoring Indigenous epistemologies), feedback mapping (anticipating cascades), and 'slow geology' (aligning human actions with Earth’s rhythms), while using speculative art to reimagine our role in this living system.