In all fairness, this is likely a structural data anomaly. ie, it is driven by the number of majors at the school, and their level of abstraction. Here are some historical data points.<p>Notice the arbitary abstraction of, eg<p>Bio Sciences
Human Biology<p>1955
1. History
2. Economics
3. Psychology
4. Political Science
5. Bio Sciences<p>1965
1. History
2. Political Science
3. English
4. Psychology
5. Economics<p>1975
1. Psychology
2. Bio Sciences
3. Economics
4. History
5. English<p>1985
1. Economics
2. Human Biology
3. Bio Sciences
4. Electrical Engr
5. English<p>1995
1. Bio Sciences
2. Human Biology
3. Economics
4. Psychology
5. English<p>and now we look at 2010 (from quora)<p>Biological Sciences (1.32%) but
Human Biology (12.58%)
Biology (5.74%)<p>=~20% of Standford majors in 2010 are &quot;biology majors&quot; in plain language usage.<p><i>Based on data on Bachelor&#x27;s Degrees conferred in the 2009-2010 school year[1], the top majors are:<p><pre><code>    Human Biology (12.58%)
    Economics (8.10%)
    International Relations (6.20%)
    Biology (5.74%)
    Computer Science (4.94%)
    Engineering (4.71%)
    Psychology (4.54%)
    Political Science (4.25%)
    English (3.96%)
    History (3.62%)
    Management Science and Engineering (3.39%)
    Mechanical Engineering (3.10%)
    Science, Technology, and Society (2.30%)
    Communication (2.18%)
    Electrical Engineering (2.07%)
    Mathematics (2.01%)
    Earth Systems (1.84%)
    Physics (1.84%)
    Sociology (1.49%)
    Biological Sciences (1.32%)*</code></pre>