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How Humans Became Bipedal (And When We First Walked)

For millions of years, our ancestors moved through the world on four limbs. Then, slowly and irrevocably, something changed. Standing upright reshaped the human body, rewired survival strategies, and set us on a path no other species has followed in quite the same way.

This documentary explores how humans became bipedal — and when we first walked on two legs. From the earliest hominins leaving the trees to the anatomical changes locked into our hips, spine, feet, and skull, bipedalism was not a single moment, but a long evolutionary gamble with lasting consequences.

Here, you’ll discover:

• When the first hominins began walking upright
• Why bipedalism evolved in the first place
• How walking on two legs changed childbirth, speed, and endurance
• The evolutionary trade-offs that still cause pain today
• What footprints, fossils, and bones reveal about our earliest steps

A quiet, immersive journey into the moment humans stood up — and never went back.

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Before Cities helps you fall asleep while learning about the world before buildings, cars, or even farms. In each quiet video, we talk about cavemen, early humans, and what life was like thousands of years ago. You’ll hear true stories about how people made fire, hunted animals, used stone tools, and survived in the wild—all told in a calm, slow voice with soft background sounds.

To get the best sleep, lie down in bed or on the couch, turn off the lights, and let your mind travel back in time. Our videos are made to help you relax, learn something new, and fall asleep more easily.

Don’t forget to subscribe and come back often, listening to the same calm voice each night can help your body know it’s time to rest.