Acoustic device can levitate and manipulate multiple items, simultaneously.
Learn more - https://www.sciencemag.org/news/2018/12/watch-sonic-tractor-beam-do-some-midair-sewing
Read the paper - https://www.pnas.org/content/early/2018/12/11/1813047115
Video credit - A. Marzo et al., PNAS 2018 DOI: 10.1073/pnas.1813047115
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