sneaky:hate rsl$ script/console
Loading development environment (Rails 2.0.991)
>> t = Time.now
=> Tue Jun 10 13:56:49 -0400 2008
>> t.class
=> Time
>> t.years_ago(1000)
=> Fri, 04 Jun 1008 13:56:49 -0500
>> t.years_ago(1000).class
=> DateTime