Orangutans devote years of practice to nest building, an essential skill for life in the treetops. Sumatran orangutans start learning the skill at as young as 6 months old, a new study finds.
ROMEO GACAD/AFP via Getty Images
Orangutans devote years of practice to nest building, an essential skill for life in the treetops. Sumatran orangutans start learning the skill at as young as 6 months old, a new study finds.
ROMEO GACAD/AFP via Getty Images