May 17, 2012
Ultimately, protons and electrons make the atoms about some elements, and atoms make the molecules that spell out a splendor in the rich variety of matter and life in the world.
April 30, 2012
They are too small to be perceived as separate entities by our naked eyes, and so large in their numbers we can hardly imagine them. A spoonful of water contains more atoms than there are stars in the universe. They are at the deepest roots of perceived reality.
April 9, 2012
We are not content with the experience of heat and cold. We want to know what exactly is the source of these sensations.
March 12, 2012
It is light that weaves the distant corners of the universe into a cosmic wholeness and that informs us of the presence of people and things beyond ourselves.
March 6, 2012
First, what is there in the external world that strikes us as sound? Second, what is happening in the internal world underneath the skull that creates this sensation?
February 20, 2012
We are immersed in seas of waves—not just of the light and sound that please our perceptions, but many more to which our senses don't respond.
February 6, 2012
Like the soul of religions, energy is never recognized in its unclad glory; it manifests itself in different garbs. There is heat and light and motion, sound and electricity, too. All these are energy of one kind or another.
September 29, 2011
The box can be moved by giving it a push, and the cart by pulling it. We affect the motions of objects by imposing direct or indirect pushes and pull. Pushes and pulls are what we call forces.

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