Diary of a rail fan in Kansai,Japan(Ver.2)

About world's rail news, general news, my train pictures, and travel diary)

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. クリエイティブ・コモンズ 表示 - 非営利 - 改変禁止 4.0 国際 ライセンスの下に提供されています。

List of my travel diary My train photoes The other contents

Entries from 2021-04-10 to 1 day

Why was it difficult to save people breathing without enough oxygen?

Ancient cave artists starved themselves of oxygen while painting https://edition.cnn.com/style/article/cave-art-study-scli-intl-scn/index.htmlIn those days, it must have been difficult to find out real reason why it's difficult to breathe …