What can penguins teach us about our evolutionary past?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

Penguins and humans are the only bipedal creatures on the planet that habitually walk upright on land. What does this tell us about our evolutionary past?

Neil Hornsby, Inverness

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Source: The Guardian
What can penguins teach us about our evolutionary past?