Scientists Estimate 2.5 Billion T. rex Lived as Only 32 Good Specimens Survive
Updated
Updated · spacedaily.com · Aug 2
Scientists Estimate 2.5 Billion T. rex Lived as Only 32 Good Specimens Survive
3 articles · Updated · spacedaily.com · Aug 2
Summary
Charles Marshall’s team estimated about 2.5 billion Tyrannosaurus rex lived over the species’ roughly 2.4 million years, despite a wide uncertainty range of 140 million to 42 billion.
Only about 32 relatively well-preserved post-juvenile T. rex specimens are held in public museums, implying roughly one recovered specimen for every 80 million animals that lived and died.
That vanishingly small recovery rate reflects the hurdles to fossilization: a carcass had to be buried quickly, survive scavenging and decay, endure tens of millions of years of geological change, and later be found by humans.
T. rex is still among the best-documented dinosaurs, underscoring how much paleontology reconstructs from sparse evidence and how much of Earth’s past life likely left no recoverable trace.