Ice Age

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West Asian environment – Mesopotamia and Iran

By |2018-04-25T23:39:43+00:00September 13th, 2017|Environment, West Asia|

Snow in Afghanistan Afghanistan West Asia is a dry place, where it's always hard to get enough water and there are a lot of fights over water. The easternmost part of West Asia is Afghanistan, which is mountainous and cold in the winter. On the other side of Afghanistan is China, and for the [...]

Black Sea – West Asian Environment

By |2018-04-25T23:35:41+00:00September 13th, 2017|Environment, West Asia|

Black Sea coast (from Turkey) The Black Sea was originally a fresh-water lake. In the Stone Age, many people lived around the edge of this lake. But around 7000 BC, as the world came out of the last Ice Age and all the glaciers melted, sea level rose. The Mediterranean Sea spilled over the little bit of land that separated it [...]

Before 10,000 BC – World history timeline

By |2018-04-25T23:04:13+00:00September 10th, 2017|Africa, History|

Sibidu Cave, South Africa. People lived here from about 77,000 BC until about 38,000 years ago. In the early years of human history, beginning with the earliest humans about two million years ago, every place in the world was in the Stone Age, and all the people in the world got their food by hunting and gathering. For a [...]

Traditional Native American origin stories

By |2018-04-19T15:42:20+00:00August 9th, 2017|History, Native American|

Rocky Mountains Some Native people don't agree that their ancestors came originally from East Asia. These Native American people believe that their ancestors were always in North or South and Central America. There's no really definite evidence either way, yet. Many archaeologists and historians think that Native American people came from East Asia. They say that mainly [...]

Archaic North America – Native Americans

By |2018-08-28T12:58:01+00:00August 8th, 2017|History, Native American|

Archaic North America - the glaciers melted with the end of the Ice Age When did the Archaic period begin? After the Paleo-Indian period, beginning about 8000 BC, came the Archaic period. During the Early Archaic period, the Ice Age ended. The great glaciers that covered the northern part of North America gradually melted away. Hunters started [...]

American geography and environment – Native Americans

By |2018-04-19T11:28:44+00:00August 8th, 2017|Environment, Native American, North America|

North American environment: The north Most of North America was (and is) just not very good for people to live in. That's why not that many people lived in North America before 1500 AD. In the north, it's too cold to support very many people. The winters are too long to grow crops, and there isn't [...]

Silurian period – Fish get jaws

By |2018-04-19T11:29:11+00:00June 25th, 2017|Biology, Geology|

Silurian period: Trout swimming When was the Silurian period? The beginning of the Silurian period was about 443 million years ago. Some environmental problem at the end of the Ordovician period (probably ice ages) killed most of the plants and animals on Earth. The creatures that survived this extinction were the ones that [...]

Quaternary period – modern times

By |2018-11-09T07:50:38+00:00June 24th, 2017|Biology, Geology|

The Quaternary Period includes today - big cities and all When was the Quaternary Period? The Quaternary period began about 1.8 million years ago (1,800,000 years ago), coming after the Tertiary. The Quaternary is still going on today - we live in the Quaternary period. So far, it's a much shorter period than [...]

Bering land bridge – Native Americans

By |2018-11-09T07:05:43+00:00June 20th, 2017|Environment, History, Native American|

Bering Strait - today there's ocean, but long ago there it was the Bering land bridge Ocean levels were lower During an Ice Age, when the world is colder, more of the world's water freezes into ice. So less water is in the oceans than before. This makes the level of the oceans [...]

Farming and famine – Climate change

By |2018-04-19T14:44:11+00:00June 20th, 2017|Environment|

Climate change: Hunters, bison and aurochs Cave painting from Lascaux, ca. 15,000 BC Climate change encouraged the evolution of the first humans, who probably evolved in Africa as the climate got drier and grasslands replaced jungles. People came down from the trees and evolved to swim and fish. They learned to walk upright [...]