List rendering wrong margin

Nested list has a large margin-top which makes the list seems ugly. margin-bottom should be larger than margin-top.

* Human perceptions:
  * Easy to be deceived by illusions
  * Processes:
    * Extraction of features (rapid)
    * Pattern perception (slow)
    * Memory

  * Preattentive processing
    * Speed is independent of number of distractors, fast (<= 10ms)
    * Measurement:
      * Degrees of pop out (strong effects based on color, contrast, etc)
      * Degrees of difference (difference between objects in size, color)

    * Conjunctions of features might be not preattentive even though there are strong differences.