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We've Spent $50 Billion Exploring The Rocky Planets: Here's Everything We Know

Spark SPARK · OCT 07, 2026

This YouTube video has 56 000 views and was published Oct 7, 2026 on Spark. That is 1.5x the channel's average views.

We've Spent $50 Billion Exploring The Rocky Planets: Here's Everything We Know ▸ WATCH ON YOUTUBE
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This video is at 1.5x the channel's average views.
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