As for the forces electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So in physics lots of the basic building blocks take 20th- or perhaps 21st-century equipment to explore.

As for the forces electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So in physics lots of the basic building blocks take 20th- or perhaps 21st-century equipment to explore.

One of the basic things about a string is that it can vibrate in many different shapes or forms which gives music its beauty.

One of the basic things about a string is that it can vibrate in many different shapes or forms which gives music its beauty.

But the beauty of Einstein's equations for example is just as real to anyone who's experienced it as the beauty of music. We've learned in the 20th century that the equations that work have inner harmony.

But the beauty of Einstein's equations for example is just as real to anyone who's experienced it as the beauty of music. We've learned in the 20th century that the equations that work have inner harmony.