Home » breathing

Ibn Sina (Avicenna) – Medieval Islamic medicine – Islamic Empire

By |2019-04-24T06:03:09-07:00July 27th, 2017|Islam, Science|

Where Ibn Sina came from: Uzbekistan Ibn Sina and the Samanids in Uzbekistan Ibn Sina (known to Europeans as Avicenna) was a scientist. He was born about 980 AD in the north-eastern part of the Abbasid Empire. That was in the kingdom of the Samanids. (It's modern Uzbekistan.) Who were the Samanids? Medieval Islamic science All our medieval Islam [...]

How do animals breathe? Respiration, Evolution, Biology

By |2018-04-21T11:56:44-07:00May 27th, 2017|Biology|

Fish gills The first cells, which evolved about 3.8 billion years ago, needed carbon dioxide to live and not oxygen. They needed the carbon dioxide to help them break down molecules to get energy out of them, and they were able to get the carbon dioxide they needed from the oceans they lived [...]

Lungfish – Evolution of Fish

By |2018-04-15T17:26:06-07:00May 26th, 2017|Biology|

Evolution of fish: a lungfish About 400 million years ago, during the Devonian period, the Earth was going through an especially warm period. Some of the smaller oceans and lakes were drying up, leaving big muddy puddles all around them. This was no good for fish, which had less room to swim around [...]