One of Professor Roberts' avocations is the culture of tropical orchids. Please visit the home page of the Massachusetts Orchid Society.
The tides confuse many students. Here is an explanation.
Your civil liberties are under attack from many quarters, including the right-leaning Supreme Court and the profoundly disappointing Obama administration... If you want to do something about this, join The American Civil Liberties Union before it's too late. Check out your elected representatives at the ACLU site.
Photography is one of Professor Roberts' passions. For some examples of his work, see DR Photography.
Bill Amend (a fellow Amherst College graduate) has a nice outlook on physics, too,