Dark matter is one of the greatest mysteries in modern science.
Although it cannot be seen directly, scientists believe dark matter makes up a large portion of the universe and plays a key role in how galaxies form and move.
This video explains what dark matter is, why scientists believe it exists, and how it influences the structure of the universe.
▶ Topics covered:
What dark matter is
Why it cannot be seen
Evidence from galaxy movement
Its role in the universe
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