Otto Hahn's final piece of writing about meteorites (1882) was concerning two witnessed falls of gelatinous meteorites. Sticky with appearance like frogspawn. Quite curious! We need to preserve them ASAP when they land.

Report on Two Gelatinous Meteorite Falls by Dr. Otto Hahn in Reutlingen: github.com/solaranamnesis/jahr…

#meteorite #history

Abandoned dual track train tunnel from 1907. Spotted along the West Penn rail trail.

#railtrails #railtrail #cycling #cyclingphotos #pa #pennsylvania #photography #tunnel #abandoned #train #rail #history

New editions of The Nummulosphere Part 3 and Part 4 have been published on Archive.org:

Part 3: archive.org/details/kirkpatric…

Part 4: archive.org/details/kirkpatric…

#nummulosphere #meteorite #science #history #ocean

The Nummulosphere Part 3: The Ocean Floor or Benthoplankton : Randolph Kirkpatrick : Free Download, Borrow, and Streaming : Internet Archive

[pt. 1] An account of the organic origin of so-called igneous rocks and of abyssal red clays.--pt. 2. The genesis of the igneous rocks and of meteorites...

^{Internet Archive}

This list of the earliest know use of maths terms is an amazing way to loose time finding old (but super interesting) papers to read thru! Stuff you may likely never come across otherwise!

For someone like myself who loves, but is less than proficient at, maths.... this is a treasure trove of older and more approachable technical papers! And if you are a maths wizard, well I'm sure you can appreciate it for the history and maybe add some obscure older papers to your offline archive! ;)

Link: Earliest Known Uses of Some of the Words of Mathematics

#maths #math #mathematics #science #stem #numbers #smartereveryday #history