Ski-equipped C-130 on the ground at South Pole Station.

Point Barrow in the winter. A Clean Air Atmospheric Observatoru located here.

Clean Air Atmospheric Observatory on right of picture.

Clean Air Facility at Point Barrow.

Tractors for transportation at Point Barrow.

The lighthouse at the entrance to Halifax Harbor.

Looking south from communications Tower Zero at Northwest Cape

Australian Department of Science and U.S. Air Force Solar and Radio Observatory at Learmonth. Looking east.

Australian Department of Science and U.S. Air Force Solar and Radio Observatory at Learmonth. Looking east.

Australian Department of Science and U.S. Air Force Solar and Radio Observatory at Learmonth. Looking northeast at radio telescope and administration buildings.

A solar prominence.

Radio telescopes at Learmonth Observatory.

Looking southeast towards the Gulf of Exmouth and the Learmonth Observatory from the Charles Knife Road.

The lighthouse at Northwest Cape

A busy Northwest Cape beach looking southwest towards the Indian Ocean.

A VERY busy Northwest Cape beach with one person.

The O'Clock family cavorting with the dolphins at Monkey Mia near Shark Bay. These dolphin are wild and associate with humans with no training or coercion (except food.)

Pirkko O'Clock (ex-NOAA Corps officer) and tourists cavorting with the dolphins at Monkey Mia near Shark Bay. These dolphin are wild and associate with humans with no training or coercion (except food.)

Commander Bill O'Clock feeding the dolphin at Monkey Mia near Shark Bay.

Pressure ridge on sea ice on McMurdo Sound

Tractor-train on Skelton Glacier leaving McMurdo Station for South Pole McMurdo Station to South Pole traverse

Tractor-train on Skelton Glacier leaving McMurdo Station for South Pole McMurdo Station to South Pole traverse

Tractor-train heading up Skelton Glacier McMurdo Station to South Pole traverse

Mountain on the south side of Skelton Glacier McMurdo Station to South Pole traverse

Tractor-train heading up Skelton Glacier McMurdo Station to South Pole traverse

Tractor stopped while looking for crevasses on glacier McMurdo Station to South Pole traverse

Probing for crevasses on Skelton Glacier - progress sometimes only a mile/day. Note lifelines on men probing. McMurdo Station to South Pole traverse.

Checking out a crevasse McMurdo Station to South Pole traverse

Sometimes the crevasses appeared hundreds of feet deep. McMurdo Station to South Pole traverse

Sometimes the crevasses appeared hundreds of feet deep. McMurdo Station to South Pole traverse

Tractor-train stopped on way up Skelton Glacier McMurdo Station to South Pole traverse

The crevasses were capable of swallowing the tractors. McMurdo Station to South Pole traverse

The crevasses were capable of swallowing the tractors. McMurdo Station to South Pole traverse

To bridge the larger crevasses, boards were brought to use as bridges. McMurdo Station to South Pole traverse

The trail of the tractor-train receding far into the distance. McMurdo Station to South Pole traverse

Passing along the front of the Trans-Antarctic Mountains on the way up Skelton Glacier. McMurdo Station to South Pole traverse.

Cracks in sea ice as seen from the air

Flying over large tabular icebergs on the way to McMurdo Sound

Flying over large tabular icebergs on the way to McMurdo Sound

Flying over large tabular icebergs on the way to McMurdo Sound

A pressure ridge on the sea ice at McMurdo Sound

Viewing some of the scenery in the vicinity of McMurdo Sound

A rugged glacial sculpted valley near McMurdo Station

A closeup of a jumbled mass of ice on a mountainside

A closeup of a jumbled mass of ice on a mountainside

Going down into a large crevasse for a closer look.

Grabbing a drink from a snow-melt stream

An Antarctic dry valley.

A lonely Antarctic outpost

Looking into an Antarctic dry valley