- First humans: Homo sapiens early human migration (article . . . - Khan . . .
Homo sapiens, the first modern humans, evolved from their early hominid predecessors between 200,000 and 300,000 years ago They developed a capacity for language about 50,000 years ago
- How Did the First Humans Live? (article) - Khan Academy
The first humans originated in Africa's Great Rift Valley, a large lowland area caused by tectonic plate movement that includes parts of present-day Ethiopia, Kenya and Tanzania Human ancestors traveled in all directions, constantly in search of abundant food resources and new places to inhabit
- Peopling the earth (video) | Khan Academy
Prehistory before written records Knowing prehistory Homo sapiens and early human migration Peopling the earth
- READ: Eratosthenes of Cyrene (article) | Khan Academy
Yet his most lasting achievement was his remarkably accurate calculation of the Earth’s circumference (the distance around a circle or sphere) He computed this by using simple geometry and trigonometry and by recognizing Earth as a sphere in space
- WATCH: How Did The First Humans Live? - Khan Academy
So all in all, by about 10,000 years ago, we know that humans have settled all parts of the world, apart from Antarctica, so there's nowhere else, really, or there's not much room to settle now Coincidentally, at about the same time, global climates began to change as the Ice Age has ended
- Cell theory (video) | Introduction to cells | Khan Academy
Hooke and Leeuwenhoek were two of the first scientists to use microscopes to study the microscopic world of cells Hooke coined the term "cell" after observing the tiny compartments in cork, while Leeuwenhoek discovered a variety of living creatures in pond water, blood, and other samples
- READ: Human Communities Populate the Earth - Khan Academy
Collective learning is, therefore, what allowed our human ancestors to populate the Earth By sharing and preserving knowledge across generations, humans made significant improvements to how they lived and survived
- READ: Alfred Wegener and Harry Hess (article) | Khan Academy
Wegener was not the first to present the idea of continental drift, as he called it, but he was the first to put together extensive evidence from several different scientific approaches He used fossil evidence, such as that of tropical plants found on the Arctic island of Spitzbergen
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