kidneys

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6 09, 2017

Human body – history of medicine

By |2019-09-04T04:51:54-07:00September 6th, 2017|Science|0 Comments

Ebers Papyrus, one of the oldest known medical texts about the human body. From Egypt, about 1550 BC How does the human body work? Doctors have been trying to figure out how the human body works since the Stone Age, and there are still many things we don't know about the human body even [...]

26 06, 2017

What is jade? Metamorphic rock

By |2019-09-18T07:51:37-07:00June 26th, 2017|Geology|2 Comments

What is jade? Jade rock from Alaska Jadeite and nephrite Jade is really two kinds of metamorphic rock, jadeite and nephrite, that look pretty much exactly the same. Scientists can tell them apart using chemical tests and x-rays. Like quartz, both jadeite and nephrite are chains of silicon and oxygen atoms. Why is [...]