Robot appendage actuation

A robot neck comprising:

• a first linear actuator coupled to a first end of a first rod;
• a second linear actuator coupled to a first end of a second rod;
• wherein a second end of the first rod and second end of the second rod are sized and positioned to contact a first and second track of an appendage to slidably engage the first and second rods with respective ones of the first and second track;
• and
• one or more structures sized and positioned to removably engage a linkage to couple the appendage with a neck.

A robot appendage comprising:

• a first track sized and positioned to slidably engage a second end of a first rod coupled to a first linear actuator;
• a second track sized and positioned to slidably engage a second end of a second rod coupled to a second linear actuator;
• and
• a linkage removably coupled with an appendage.