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Stunning array of 400 rings in a 'reflection' nebula solves a 30-year-old star-formation mystery — Space photo of the week
The discovery is the first direct observational confirmation of a theory for how young stars feed on, and then explosively ...
Objectives The use of economic evidence to prioritise vaccines and delivery strategies to optimally use in immunisation systems is becoming a global priority, especially in low- and middle-income ...
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