No one can actually see it. No one knows what it is or how it works. But, after a five-year study of 200,000 galaxies, scientists are as certain as they'll ever be that dark energy exists, and it is tearing our universe apart.
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1-in-5 Brits Think Lightsabers Are a Thing That Exists
A surprisingly high number of people in the United Kingdom seem to believe that lightsabers, memory-erasing technology and time travel are all possible.
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