Mark Nelson is measuring soil moisture next to a CO2 efflux device, Biosphere 2. Oracle, Arizona, United States. Marsh 18, 1993 - History Education Network

Latest :

Training carrier USS Lexington (AVT-16) in the Gulf of Mexico, circa 1991

Ernest Hemingway writing outdoors in Sun Valley, Idaho, in 1939 while working on For Whom the Bell Tolls

The Two-State Solution according to Netanyahu, 2015

‘Refugees not welcome. Mohammed not welcome’, Poland 2019.

First supreme leader of Iran Ayatollah Khomeini while in exile in France in 1978

Mark Nelson is measuring soil moisture next to a CO2 efflux device, Biosphere 2. Oracle, Arizona, United States. Marsh 18, 1993

Categories: 1900s

you might also like