* Astronomy

Landmark wildlife summit gives reasons to be cheerful about conservation

An international wildlife event, organised by the University of Oxford and partners, has highlighted the wide progress being made in conservation.
During a two-day run, more than 250 people attended the Conservation Optimism Summit in London, highlighting environmental success stories from around the world. Hundreds more attended the linked public event at ZSL London Zoo on Earth Day, as well as sister events in cities around the world, including Washington, Cambridge, Hong Kong and Colombia.
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