PC LENS - UV400 blocks 100% of UVA/UVB rays; Impact resistant, anti-scratch and shatter proof FEATURES - Removable wind resistant eye liner; Option to convert to goggles with included backstrap ...
Interesting Engineering on MSN1h
Astronomers spot rare double-gravitational lens formed by two aligned galaxiesAstronomers have discovered two galaxies that are perfectly aligned, allowing their combined gravitational pull to act as a compound lens.
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