weird hash onto array behavior

ruby.rb

s.each do |i|
  i.bindings.each do |k,v|
    hash = Hash[k.to_sym, v.to_s] 
    attrs.merge!(hash)
  end
  p attrs
  container_array << attrs
  p container_array
end

#p output=>  {:uri=>"http://facade.mit.edu/dataset/test", :name=>"test", :description=>"", :path=>"project"}
[{:uri=>"http://facade.mit.edu/dataset/test", :name=>"test", :description=>"", :path=>"project"}]
{:uri=>"http://facade.mit.edu/dataset/new", :name=>"new", :description=>"", :path=>"project"}
[{:uri=>"http://facade.mit.edu/dataset/new", :name=>"new", :description=>"", :path=>"project"}, {:uri=>"http://facade.mit.edu/dataset/new", :name=>"new", :description=>"", :path=>"project"}]

 #final array=> [{:uri=>"http://facade.mit.edu/dataset/new", :name=>"new", :description=>"", :path=>"project"}, {:uri=>"http://facade.mit.edu/dataset/new", :name=>"new", :description=>"", :path=>"project"}]