Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...

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The faint traces of a second rainbow was visible above the more defined rainbow. A series of photos of the rainbow was shared in the CloudSpotting & SkySpotting Singapore Facebook group.

In his book The Mathematical Universe, mathematician William Dunham wrote of John Venn’s namesake legacy, the Venn diagram, “No one in the long history of mathematics ever became better known ...