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AstronomyThe star Betelgeuse might just be dusty, not about to explode
A new study suggests that dust recently expelled by Betelgeuse is why the star dimmed suddenly in late 2019 before brightening again.
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SpaceNew fleets of private satellites are clogging the night sky
As private companies launch dozens of satellites at a time, researchers are assessing the impact on ground-based telescopes.
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Health & MedicineWhat WHO calling the coronavirus outbreak a pandemic means
The world’s top global health organization is asking countries to double down on efforts to both contain the virus and mitigate its impact.
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PaleontologyThis ancient dinosaur was no bigger than a hummingbird
The skull of one of these Mesozoic Era birds — the tiniest yet known — was discovered encased in a chunk of amber originally found in Myanmar.