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A Moment of Science
One theory about how life began on Earth: it was transported here by space dust.
If conditions are just right, you can actually see interplanetary dust in the form of zodiacal light.
The secret to the origins of life on Earth could be in the dust that's leftover after solar systems form.
Beyond our atmosphere flies a lot of debris. Some fragments can be larger than mountains, but most is space-dust.
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