Mary Leakey's discovery of fossil footprints in volcanic ash at Laetoli was important because:
A) it warned locals of the presence of a nearby active volcano.
B) fossil animal footprints had never before been discovered.
C) the volcanic ash had preserved the footprints of at least two bipedal hominids.
D) it proved that hominids manufactured and used stone tools prior to the origin of bipedalism.

Question

Quizplus · Accepted Answer

The discovery of fossil footprints at Laetoli was significant because it provided clear evidence of bipedalism in hominids dating back to 3.6 million years ago. The footprints, preserved in volcanic ash, showed that these early humans walked upright on two legs, a key characteristic distinguishing hominids from other primates.

Mary Leakey's Discovery of Fossil Footprints in Volcanic Ash at Laetoli