What is do a barrel roll OR Z or R twice - OXYGEN

Do a Barrel Roll, a Google Easter Egg trick. You can perform this trick by searching Google for do a barrel roll, Z or R twice.

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Scanning Electrochemical Cell Microscopy Investigation of Single ZIF‐Derived Nanocomposite Particles as Electrocatalysts for Oxygen Evolution in Alkaline Media - Tarnev - 2019 - Angewandte Chemie International Edition - Wiley Online Library

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Z or R Twice - Google Barrel Roll

Comparison between Malolactic Fermentation Container and Barrel Toasting Effects on Phenolic, Volatile, and Sensory Profiles of Red Wines

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Widespread occurrence of covalent lysine–cysteine redox switches in proteins

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Nikon Nikkor Z DX 18-140mm F3.5-6.3 VR Review

What is do a barrel roll OR Z or R twice - OXYGEN

Cryo-EM structure of a type IV secretion system