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Our ancient human ancestors once lived only in Africa, in tiny bands of a few thousand hunter-gatherers. Then we moved out of our African cradle, spreading rapidly to every corner of the planet.

How did we acquire the skills, technology and talent to thrive in every environment on earth? How did our small boats big waves youtube live forebears cross the Sahara on foot, survive frigid ice ages, and sail to small boats big waves youtube live Pacific islands? Premiered October 5, Foryears, the odds have been against us.

There are evolutionary dead-ends; there are some species that don't survive. He's looking for echoes of the past in the skills of people living in remote and demanding environments, conditions our ancestors had to surmount on their journey to. How did our greatest of grandparents not only survive their treacherous world, but ultimately become our planet's dominant species?

NARRATOR : In every nook and cranny, on every continent, in places where the living is easy and where it is harsh and unforgiving, we look different, our skin, various shades of color, our children, a palette of their parents, but under the skin, our D. Until recently, much of our ancestors' early history remained a mystery.

What they left for us is their bones. NARRATOR : But now, new discoveries are beginning to reveal their complex evolution, their strategies for survival, and their seemingly relentless drive to reach. Understanding how our ancestors accomplished this feat is driving anthropologist Niobe Thompson on his own around-the-world journey.

NARRATOR : He's exploring important archaeological sites and Small Boats Hitting Big Waves 03 observing the world's last hunter-gathers, to understand how our ancestors were able to conquer every environment on Earth. That's astonishing! But that's not how our story began, far from it. Here, more than 3, years ago, a creature named Lucy walked upright, as we do, yet her brain was no bigger than an orange and she climbed trees like an ape.

Over time, a bewildering array of ancestors evolved more human-like features but remained small-brained and very primitive. By 2, years ago, bigger-brained creatures like Homo erectus emerged and began making larger and more sophisticated stone tools.

Our Homo sapien ancestors had finally arrived. But uncovering fossil evidence of these early ancestors is extremely rare, as Ethiopian paleontologist Berhane Asfaw knows all too. It's very small. Discovered near the Ethiopian village of Herto, atsmall boats big waves youtube live old, Herto Man is the most complete early human skull ever. He was unearthed in the dry Middle Awash region of Northern Ethiopia. See the ridge running up there?

All the sandstones small boats big waves youtube live here have fossils. Stay within meters of me. Go have fun. Then inBerhane Asfaw small boats big waves Small Boats You Can Live On 900 youtube live bone fragments that looked distinctly human. NARRATOR : Finding fossils crushed into pieces by time and geologic forces is not unusual, so the team was astounded when they found a nearly intact adult skull, which they carefully wrapped for conservation.

It is basically a brain-dominated individual. All the features it has is exactly us. But what do we really know about him?

How did he live his life? Today, the Herto region is dry for much of the year and looks like it could hardly support any life. But excavations have uncovered numerous animal remains and stone tools from a time when the valley was far more fertile. The Herto of our ancestors had rich vegetation and a lake that drew prehistoric buffalo, hippos and other game they small boats big waves youtube live for food.

The bones of these animals have been unearthed, and they have an important story to tell. Humans were repeatedly feeding on hippo meat. But humans weren't their only hunters. Deadly carnivores stalked the lake, so our ancestors needed to be tightly organized to avoid becoming meals themselves.

Archaeologist Small boats big waves youtube live Beyene has studied all the Herto finds and can almost visualize how our ancestors must have hunted. Whatever meat they find, they encounter, they must cut it fast and move. And that cooperation among the group members must have contributed to their success as humans in that difficult environment. YONAS BEYENE : Somebody who makes such kind of tool has an organized brain, hunting together, acting together, and it is that social behavior, social culture which pushed us, you know, to evolve, to evolve to what we are.

One-hundred-thousand years later, they are still hunter-gatherers, but now they're on their way small boats big waves youtube live becoming the most dominant species on Earth.

How did this remarkable transformation come about? That is what we have to understand. We are an incredible construction, Homo sapiens. Throughout the years small boats big waves youtube live our ancestors' emergence, there were severe climate changes. Large swaths of Africa became bone dry, forcing animals and people to seek more fertile ground. How did our ancestors survive these environmental crises? What did they do when the food and water ran out?

They clearly made it, because we are. The question is how did they do it? Although many of the San have been moved out of their traditional homeland, small groups continue the resilient ways of their ancestors. Anthropologists like Niobe have been observing such societies for decades, trying to understand their social, cultural and spiritual beliefs and how they live their day-to-day lives, from the food they eat to the natural medicines they use.

Living in one of the world's driest environments, members of this group can still survive in traditional ways. Niobe accepts an invitation to follow the men on a hunt. This will give him a rare opportunity to see if these hunters display strategies our ancestors might have used to find food in this desolate landscape. One of the techniques the San are known for is called "persistence" hunting.

Humans are not built to be natural killers, like the great carnivores of Africa. They haven't the speed, power, teeth or claws. We also do not have much body hair, and that's to our advantage. In the hot sun, lions and other fur-covered animals need to release body heat by panting or sweating through their tongues.

Humans can sweat from all parts of the body, and by doing so can endure the intense heat longer. Hunters like the San can't outrun faster animals, but they can outlast and exhaust them before making the kill. It is very possible our ancestors hunted just this way.

There are few game animals in this area of the desert but enough so Niobe can observe small boats big waves youtube live San's skills firsthand. They're not scanning the horizon to see the animals, they're looking for their tracks in the sand. It's like they're reading a book, and they can still find their prey. Yonas has found a springhare. They've hooked it through its den, using their long hooked stick. Our kidneys were evolved in a jungle environment, so they're designed to flush two liters of water a day.

So, what would our ancestors have done in place like this, the Kalahari, which receives no rain for nine months at a stretch. Wherever and however they find water, the San know how to store it in ostrich egg sip wells for even drier times. And if you find a water source, you can easily fill up this, these ostrich eggshells.

And so, if you are able to carry around a large number of these ostrich eggshell flasks, you have a constant source of water. You could even, like a Hansel and Gretel, be leaving yourself a pathway of stored water. Then who knows how far you could travel.

NARRATOR : Archaeologists have unearthed fragments of ostrich egg sip wells fromyears ago, so the San are indeed using an ancient technology borrowed from the past. Like wild game, nuts and berries were also the food of our ancestors.

But the San are 10, generations removed from those ancestors, so their lives are really quite different than they would they been in the past.

These desert people have clearly retained the kind of adaptability our ancestors must have possessed to survive in such dry environments, but even this kind of resourcefulness may not have been sufficient, for there were times when drought became so extreme, parts of Africa turned virtually unsustainable for human life.

NARRATOR : Where small boats big waves youtube live drying rivers and disappearing grasslands of the interior made life virtually impossible, some of our ancestors began searching for a place that could sustain them, and they found it by the sea. It was here, along South Africa's rocky coastline, that bands of early humans would discover new sources of nourishment and possibly, something critical about themselves, as.

High up this cliff face, in a cave near Pinnacle Point, archaeologists are uncovering evidence that aroundyears ago, early humans found refuge here and perhaps ideal conditions for an unprecedented expansion of the human mind. And those small boats big waves youtube live things together make for the ideal conditions for the refuge.

Maybe it was our regular consumption of all those shellfish that provided the nutrients for the brain to become better wired. NARRATOR : Whether it was seafood or just an abundance of all food, ancient humans seemed to have thrived here, as evidenced by the many things they left.

And they also discovered thinner blades, made from a stone called silcrete. These slim, sharp points were thought to have been invented thousands of years later, but the team is finding hundreds of them here at Pinnacle Point. Experiments showed that ancient humans heated silcrete to very high temperatures.

After the small boats big waves youtube live cooled, they could be flaked off in thin, razor sharp pieces. And the way they were mounted is, is you would take a dart, so maybe something made out of bone or wood, you'd grind a slot into it, and then you'd glue these little sharp blades into.

And the whole idea is true projectile technologies, spear throwers or bows and arrows. You need to know how to make the glue to insert it. The whole thing is a long recipe that's complex.

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