Evolution - The ability to control ear muscles
Yes, humans have lost the ability to move their ears toward sounds like many other animals such as cats and rabbits. 

It is thought that our ancestors lost the ability to move their ears around 30 million years ago when 


  Ear size decreased and the associated musculature changed 1 (Steven Hackley).


A review from Steven Hackley outlines the evidence that the neural circuit remains in modern human brains. Apparently, the neural circuit still responds to directional sounds and may cause our ears to curl slightly (2 - 3 mm).