Technology 19 August 2020 By Chris Stokel-Walker RoBeetle: small but powerful Yang et al., Sci. Robot. 5, eaba0015 (2020) One of the world’s smallest microrobots is able to carry 2.6 times its own body weight thanks to a muscular system powered by alcohol. Conventionally, the “muscles” of small robots have been tethered to an external…
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