"In order to disprove the assertion that all crows are black, one white crow is sufficient." ~ William James

Welcome to the 131st Daily Field Note! Here you find the top post of the day, one covering each scientific field that is included by Geopolis. Since these authors put a lot of effort in writing a good post they surely deserve the extra exposure.

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Geology: Optical Mineralogy

Original post by @mountainwashere

There's a long history of scientists showing off how cool their object of study looks through a microscope, but it's pretty hard to beat geologists. Optical mineralogy is the study and identification of minerals and rocks through measuring their optical properties, largely through a mineralogical (or petrographic) microscope. It's an essential tool in the geologist's toolbox- I've posted thin sections in some of my previous geology articles- but I've never really spent a lot of time explaining the process. I'm going to give a quick rundown of optical mineralogy- and, as a bit of a bonus, all of the mineral thin section photos in this article are ones I've taken myself.

Archeology: EGYPTOLOGY: Science in Ancient Egypt, Part# 2

Original post by @laylahsophia

In my previous article about science in Ancient Egypt, I told you some interesting facts about Astronomy and Mathematics in antiquities times. As I promised you, I will now share with you the latest research on other "scientific" areas belonging to the natural sciences. The quotes on "scientific" are intentionally set because I wanna remind you, that the Ancient Egyptians did not do "research" in our modern understanding. They were thinking and acting innovatively in order to solve problems - far more than just for "gaining knowledge". And they did not fix their expertise on papyri and tomb walls to preserve it for following generations. They believed in an afterlife in eternity. That's why they were so keen on writing down in detail what they did - may it be the simple daily life or even complex activities.

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