Mars was bright and close six weeks ago, but now Earth is rushing ahead in our smaller, faster orbit around the sun. From our perspective, the red planet is beginning to dim. See it near Wednesday night's moon. Read more.
Scientists say the cross-hatchings on this stone are the earliest-known drawings by humans. How do they know the marks are intentional drawings, and not just random scratches? Here’s the story.
A gibbous moon appears more than half-lighted but less than full. Full moon - Harvest Moon for the northern half of the globe - will come on September 24-25. Read more.
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