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  2. Wikipedia : Public domain image resources

    en.wikipedia.org/wiki/Wikipedia:Public_domain...

    This is one of the largest collections of public domain images online (clip art and photos), and the fastest-loading. Maintainer vets all images and promptly answers email inquiries. Open Clip Art – This project is an archive of public domain clip art. The clip art is stored in the W3C scalable vector graphics (SVG) format.

  3. Radix (gastropod) - Wikipedia

    en.wikipedia.org/wiki/Radix_(gastropod)

    Radix is a genus of air-breathing freshwater snails, aquatic pulmonate gastropods in the family Lymnaeidae, the pond snails. [2] The genus Radix has a Palaearctic ...

  4. List of major Creative Commons licensed works - Wikipedia

    en.wikipedia.org/wiki/List_of_major_Creative...

    Over 100 million photos: Various [54] Fortepan: archival photographs, and family snapshots of everyday life: CC BY-SA (100.000 images) Unsplash: user photo uploading and sharing service CC0 prior to 5 June 2017 [55] [56] Wikimedia Commons: free image and data repository, stores Wikipedia images: various free CC licenses (40+ million images in ...

  5. Patterns in nature - Wikipedia

    en.wikipedia.org/wiki/Patterns_in_nature

    Patterns in nature are visible regularities of form found in the natural world. These patterns recur in different contexts and can sometimes be modelled mathematically . Natural patterns include symmetries , trees , spirals , meanders , waves , foams , tessellations , cracks and stripes. [ 1 ]

  6. Radix tree - Wikipedia

    en.wikipedia.org/wiki/Radix_tree

    An example of a radix tree. In computer science, a radix tree (also radix trie or compact prefix tree or compressed trie) is a data structure that represents a space-optimized trie (prefix tree) in which each node that is the only child is merged with its parent.

  7. Nature photography - Wikipedia

    en.wikipedia.org/wiki/Nature_photography

    National Geographic Pictures of the Year: As one of the most respected and well-known organizations for nature photography, National Geographic began its “Pictures of the Year” contest in 2023. It invites photographers, both amateur and professional, to submit photos to compete in one of four categories: nature, people, places, and animals.

  8. Clip art - Wikipedia

    en.wikipedia.org/wiki/Clip_art

    Examples of computer clip art, from Openclipart. Clip art (also clipart, clip-art) is a type of graphic art. Pieces are pre-made images used to illustrate any medium. Today, clip art is used extensively and comes in many forms, both electronic and printed. However, most clip art today is created, distributed, and used in a digital form.

  9. Radix - Wikipedia

    en.wikipedia.org/wiki/Radix

    In contrast to decimal, or radix 10, which has a ones' place, tens' place, hundreds' place, and so on, radix b would have a ones' place, then a b 1 s' place, a b 2 s' place, etc. [2] For example, if b = 12, a string of digits such as 59A (where the letter "A" represents the value of ten) would represent the value 5 × 12 2 + 9 × 12 1 + 10 × ...