Scientists achieve optical control of phase and group velocities in everyday liquids
The phase and the group velocity of light propagating in conventional optical media cannot exceed the speed of light in vacuum. However, in so-called epsilon-near-zero (ENZ) materials, light exhibits ...
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Astronomers discover 'Quipu', the single largest structure in the known universe
Newly discovered Quipu, a superstructure in which galaxies group together in clusters and clusters of clusters, is the ...