Browsing 250 - 260 results of 468 videos
Why do the hands on clocks go "clockwise?" Seems like a circular definition, but if you looked closely at sundials in the northern hemisphere, you'd notice that the shadow of the sun moves around the sundial in a "clockwise" direction. This was adopted by clock-makers and became the standard we know today.
In the southern hemisphere, the sun's shadow moves around the dial in the opposite direction, so if clocks had been invented there, our watches would move the other way. A Kenn Borek Basler (Turbo DC-3) taxis, takes-off, and flies low back over the field at Williams Airfield outside McMurdo Station, Antarctica Kenn Borek Basler(s) (more accurately called a Turbo DC-3) at the Williams Field which services McMurdo Station, Antarctica. In this interview from in front of the Canada Glacier in Antarctica’s Taylor Valley, Hassan Basagic from Portland State University describes the essential role of polar glaciers in supporting the bare-bones ecosystems in the Dry Valleys. Watch a few highlights from last year's Rubik's Cube Competition, and get ready to join us here at The Exploratorium on January 18, 2009, from 10am-4:30pm! Adelie Penguins bicker around their nests at Cape Royds, Ross Island, Antarctica. Exterior shots of Shackleton's Hut at Cape Royds. Shots inside Shackleton's Hut at Cape Royds Penguin adults tending their chicks at the colony Shots of the research pen at the Cape Royds adelie penguin colony.