Environment

/Environment
6 07, 2017

Temperature – Fahrenheit and Celsius

By |2017-08-20T23:33:25-07:00July 6th, 2017|Environment, Physics|0 Comments

See how the degrees match up. Many hot things take up more room than the same things when they are cold. Thermometers take advantage of that to measure heat. The old-fashioned kind of thermometer you see here is a narrow glass tube with a glass ball or bulb at the bottom. Inside the glass is a little bit [...]

27 06, 2017

Early European environment: northern Europe

By |2019-05-29T18:18:54-07:00June 27th, 2017|Environment, Northern Europe|0 Comments

Black Forest in Northern Europe: the early European environment had a lot of forests like this one. Not so different from Central Asia When people first arrived in northern Europe and Scandinavia, following the Danube inland from Central Asia, they found an environment that must have already been familiar to them: a lot [...]

20 06, 2017

What was the Little Ice Age?

By |2018-04-19T14:47:22-07:00June 20th, 2017|Environment|0 Comments

Rice paddy with a Chinese man planting rice During the later Middle Ages, the climate all over the world was a little warmer than usual, just by a few degrees. We call this the Medieval Warm Period. In the Americas, the warm weather caused the Mexica people to move south into Mexico, and [...]

20 06, 2017

Bering land bridge – Native Americans

By |2018-11-09T07:05:43-07:00June 20th, 2017|Environment, History, Native American|0 Comments

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 [...]

20 06, 2017

Farming and famine – Climate change

By |2019-04-09T19:16:10-07:00June 20th, 2017|Environment|0 Comments

Climate change: Hunters, bison and aurochs Cave painting from Lascaux, ca. 15,000 BC Climate change and human evolution Climate change encouraged the evolution of the first humans, who probably evolved in Africa as the climate got drier and grasslands replaced jungles. Human evolution Early primates African environment All our Africa articles People came [...]

20 06, 2017

Global warming in modern times

By |2019-07-07T11:22:27-07:00June 20th, 2017|Environment, Science|0 Comments

Coal plant in China: causing global warming When did global warming start? Human activities probably started to affect the world's climate as early as about 10,000 BC. That's when people started farming and cut down a whole lot of trees to create their fields. Climate change in world history Medieval warming The Little [...]

20 06, 2017

Climate change and the Philistines

By |2019-04-10T09:19:07-07:00June 20th, 2017|Africa, Environment, West Asia|0 Comments

Did climate change cause a Bronze Age crisis? Tomb stela of Nemti-ui, from the First Intermediate Period. The stele's only painted, not carved, because people couldn't afford carving after the climate change collapse. But even as people created the world's first cities and governments, the world continued to get warmer. This may have [...]

20 06, 2017

Climate change and world history

By |2019-04-10T07:49:05-07:00June 20th, 2017|Environment|0 Comments

Climate change and world history: Wildebeest on savannah grasslands, Kenya (Africa) African grasslands emerge In the years just before human beings first evolved, the world was a wetter place than it is now, and a lot of Africa was covered in tropical jungle, full of fruit trees and small animals. The Quaternary Early [...]

14 06, 2017

When was the First Intermediate Period? – Ancient Egypt

By |2019-06-09T07:10:59-07:00June 14th, 2017|Africa, Egypt, Environment, History|0 Comments

First Intermediate Period: a time of climate crisis? A Nilometer on Elephantine Island (Nile Valley Tours) - This ancient Egyptian device measured how high the Nile floods were each year. The Old Kingdom collapses The end of the Old Kingdom, around 2100 BC, seems to have been caused by a major climate change.  [...]

13 06, 2017

Egyptian geography and environment

By |2018-11-27T07:33:06-07:00June 13th, 2017|Africa, Egypt, Environment|9 Comments

Egyptian geography: a map showing the Sahara desert and the Nile river The Sahara Desert Egypt has a very special environment, which has played a very big part in Egyptian history. Basically Egypt is really part of the Sahara Desert, which runs all across the top of Africa. African environment All our Egypt [...]