Which dry Antarctic region includes Taylor Valley, Wright Valley, and Victoria Valley?

The dry Antarctic region containing Taylor Valley, Wright Valley, and Victoria Valley is the McMurdo Dry Valleys.

The McMurdo Dry Valleys form a largely ice-free desert system in Victoria Land, between the East Antarctic Ice Sheet and McMurdo Sound. Taylor, Wright, and Victoria are its three principal valleys, although the wider region includes many smaller valleys, glaciers, lakes, ponds, and meltwater streams.

The area is one of Earth’s coldest and driest environments. Powerful katabatic winds descend from the polar plateau, stripping away snow and moisture, while surrounding mountains block much of the glacial ice. Despite the extreme conditions, the valleys contain unusual ecosystems, including microbes living inside rocks and beneath glaciers. Saline lakes and ponds can be more concentrated than the Dead Sea.

The McMurdo Dry Valleys are also important to planetary science. Their cold, hyper-arid terrain resembles some conditions on Mars, so researchers have used the region as a natural laboratory for testing instruments and studying how life might persist in hostile environments. Antarctica’s Onyx River, its longest river, flows seasonally through Wright Valley from glacial meltwater.