A snail is an equally comforting and discomfiting creature. Its ornamental shell is both a home and armor. Its glacial pace, often accompanied by a viscous sludge it leaves behind, make it a messy if ...
Beams of light that can be guided into corkscrew-like shapes called optical vortices are used today in a range of applications. Pushing the limits of structured light, Harvard applied physicists in ...
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