Here’s what we know and what we have yet to understand.
Science
What Is the Most Abundant Element in the Universe?
Spectral measurements of stars, dust clouds, and galaxies tell us the elemental composition of the portion that consists of normal (non-dark) matter.
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The 10 Closest Stars to Earth
What Is a Flashbulb Memory?
Can You Name the Four Cerebral Cortex Lobes of the Brain?
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