two-leggedness

the evolutionary advantage of two-leggedness allowed early humans to free their hands.

despite the challenges, bipedalism – or two-leggedness – became a defining characteristic of our species.

scientists continue to study the biomechanics of two-leggedness and its impact on human evolution.

the transition to two-leggedness was a significant shift in our ancestors' locomotion.

children often struggle with balance when first learning to walk on two-leggedness.

the efficiency of two-leggedness over long distances is a subject of ongoing research.

injuries related to two-leggedness, such as knee problems, are common among athletes.

the unique skeletal structure supports the demands of two-leggedness and upright posture.

evolutionary pressures favored the development of two-leggedness in early hominins.

the stability provided by two-leggedness allowed for tool use and carrying objects.

comparing two-leggedness to quadrupedal locomotion reveals distinct advantages and disadvantages.