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Apple QuickTime movie  |  1998-04-23  |  12.1 MB  |  320x240  |  15fps  |  1 minute, 16 seconds  |  [MooV/TVOD]
Transcription: One of the cornerstones of astronomy is a linear relationship with truly cosmic consequences. Astronomers have discovered that all the galaxies are flying away from one another and that the galaxies farthest away are traveling the fastest. The linear relation between galactic speed and distance implies that the stars and planets we see today originated in the Big Bang, a cosmic explosion that occurred about 15 billion years ago. With ultrasound, doctors can allay some of the fears of pregnancy. Using the fact that fetuses grow at a linear rate, doctors can take measurements of limbs and organs ...