El Hank

Ounianga

Nallamala

Tifernine

Caniapiscau

Timbuctu

Llanos

Suez

Lunda

Opening

Fish River

Tongyu

Yorkshire

Cerros Colorados

The eastern foothills of the Andes are important areas for Argentina’s agriculture, as rivers from the mountains are impounded to supply electricity and irrigation for crops. Many types of volcanic surfaces in this region shine in spite of their aridity. The peaks of the title are at low center, and have a unique gully pattern… Read more »

Around Asia

Indigirka

Marzuk

The constant wind of the central Sahara has clustered its moving sand in great oblate dunefields called Ergs. This one is in the southwestern corner of Libya, and is spilling downwind into a rift valley. This area was a populous node during pluvial times which were associated with the continental glacial advances. Several important archeological… Read more »

Losiolo

Edge of North

The Caribou Mountains of northern Alberta dominate this late summer image, where deciduous foliage on the cusp of autumn’s turn gives the splashes of yellow-green. The large river is the Peace, and nearby wheat fields are the continent’s most northerly commercial scale agriculture. The image’s upper half is within the Wood Buffalo National Park, where… Read more »

Gilf Kebir