Fossil Footprints in Tanzania Document the Passage of a Bipedal

Question

Fossil footprints in Tanzania document the passage of a bipedal species ____ million years ago.  
A) 2.4
B) 3.0
C) 3.6
D) 4.2
E) 4.8

Accepted Answer

The fossil footprints in Tanzania, specifically at Laetoli, document the passage of a bipedal species approximately 3.6 million years ago. These footprints are significant evidence of early hominin bipedalism.