China leads the way on global greening | Nature Briefing

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Hello  Nature  readers, Today we learn that we’re about to see a lot more gravitational waves, discover how broken sleep promotes cardiovascular disease and hear how one academic couple solved the two-body problem.   Illustration of the merger of two black holes.  (Victor de Schwanberg/Science Photo Library) LIGO set to double its detecting power A planned US$35-million upgrade could enable the Laser Interferometer Gravitational-wave Observatory (LIGO) to observe the universe 325 megaparsecs (around 1 billion light years) from Earth. The observatory’s previous upgrade, in 2015, led to the influential discovery of gravitational waves from the merger of two black holes. It has since spotted ten more such mergers (plus one merger of two neutron stars), but the new revamp could enable it to spot one every day. Nature | Read this article at  nature.com/latest-news US science ………………………………