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A reindeer sled, Arkhangelsk, Russia. Late nineteenth-century photochrom.
Evolution of tetrapod visual opsins
Testing Distance Visual Acuity Using a Snellen Eye Chart
A heavily corroded radiator from a vehicle that was overheating. A visual inspection discovered that ...
Effects of Ac and Ds elements on gene expression
Mutations in cis-regulatory elements of Ultrabithorax cause homeotic transformations