Browsing 220 - 230 results of 399 programs for subject - General Science
Celebrate Pi Day— an international holiday born at San Francisco’s Exploratorium. Join us for a live webcast where we examine the nature of everyone's favorite mathmatical constant, 3.1415926535…ad infinitum!
Project: Pi Day | Browse All
Date: March 14, 2009
Category: Popular Science
Subject(s): General Science, Math
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.
Project: Ice Stories: Dispatches from Polar Scientists | Browse All
Date: January 12, 2009
Category: Science in Action
Subject(s): Astronomy/Space Science, General Science