Update README.md

README.md

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 - [Bounding volume collision detection](https://developer.mozilla.org/en-US/docs/Games/Techniques/3D_collision_detection/Bounding_volume_collision_detection_with_THREE.js)
 - [Physics based collision detection](https://medium.com/@bluemagnificent/collision-detection-in-javascript-3d-physics-using-ammo-js-and-three-js-31a5569291ef)
-- [Axis-Aligned Bounding Boxes](https://github.com/mozdevs/gamedev-js-3d-aabb) AABB based collision detection
-- [Raycast based Collision detection](http://stemkoski.github.io/Three.js/Collision-Detection.html)
 
 # Inspiration
 
@@ -242,6 +240,10 @@
 - [skunami.js](https://github.com/skeelogy/skunami.js/) Marvellous project with realistic water interaction
 - [Shallow water](https://vuoriov4.github.io/webgl-water-demo/) Demo project that shows water ripple effect
 
+## Collision detection
+
+- [Axis-Aligned Bounding Boxes](https://github.com/mozdevs/gamedev-js-3d-aabb) AABB based collision detection
+- [Raycast based Collision detection](http://stemkoski.github.io/Three.js/Collision-Detection.html)
 
 # Community