diff --git a/guide/english/computer-science/index.md b/guide/english/computer-science/index.md
index a45030da70..0b67d2b472 100644
--- a/guide/english/computer-science/index.md
+++ b/guide/english/computer-science/index.md
@@ -39,9 +39,8 @@ Computer science is categorized into several fields. The following are among the
 
 
 #### More Information
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 * [Visualization of Data Structures](http://www.cs.usfca.edu/~galles/JavascriptVisual/Algorithms.html)
 * [Khan Academy](https://www.khanacademy.org/computing/computer-science) : A deep dive into algorithms, cryptography, introductory computing, and much more.
 * [CS50](https://cs50.harvard.edu) : A free, introduction to computer science course, taught by David J. Malan and staff at Harvard & Yale Universities.
-* [Visualization of Data Structures](http://www.cs.usfca.edu/~galles/JavascriptVisual/Algorithms.html)
 * [Data Structure](https://en.wikipedia.org/wiki/Data_structure) 
+