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Nano-cleaners.

University of Colorado Boulder researchers have found that tiny, self-propelled particles can swim to escape from mazes as much as 20 times faster than passive particles, paving the way for their use in cleaning waste from hard to reach areas.

Their nanosystem is described in PNAS: http://dx.doi.org/10.1073/pnas.2101807118
#sciencenews #nanomaterials #environment
Hawking’s black hole theorem - confirmed.

Hawking’s central law for black holes predicts that the area of their event horizons should never shrink. Physicists at MIT have confirmed Hawking's theorem using experimental observations of gravitational waves.

Their confirmation is published in Physical Review Letters: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.011103
#sciencenews #astronomy