ナショナルジオグラフィックのインスタグラム(natgeo) - 12月24日 06時02分

Photo by Robbie Shone @shonephoto | The entrance to Ignatievskaya cave in the Republic of Bashkorostan, Ural Mountains, Russia, lies in a limestone cliff just a short way up from the banks of the Sim River. Lighting their path with torches,
geologist Yuri Dublyansky and two fellow researchers leave the cave after another day’s work sampling the calcite growing on top of the cave paintings. Analyzing these samples should hopefully result in understanding when the art was originally created and what the climate was like at that time.

[BIHAKUEN]UVシールド(UVShield)

>> 飲む日焼け止め！「UVシールド」を購入する