Replies to post #13 on Extraterrestrial

[SeriousMoney]

The Elegant Universe - by Brian Greene http://en.wikipedia.org/wiki/Brian_Greene



Nova series... http://www.pbs.org/wgbh/nova/elegant/

Superstring Theory... http://www.superstringtheory.com/people/bgreene.html

[SeriousMoney]

Michio's website... http://www.mkaku.org/

[SeriousMoney]

Michio's alter ego... http://en.wikipedia.org/wiki/Michio_Kaku

[SeriousMoney]

Michio Kaku's weekly radio show... http://www.kpfa.org/1pro_bio/1b_explo.htm

[SeriousMoney]

Paul Saffo's Favorite forecast...

It's actually a bet on whether the universe will eventually stop expanding.

Computer and artificial intelligence guru Danny Hillis says yes.

Former Microsoft chief technology officer Nathan Myhrvold says no.

Each has wagered $1,000.

It is a wonderful bet that provokes thought and discussion.

I hope I am around to see the answer.

http://www.investorshub.com/boards/read_msg.asp?message_id=9791330

[SeriousMoney]

String Theory http://www.crystalinks.com/stringtheory.html



String theory is a physical model whose fundamental building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that were the basis of most earlier physics. For this reason, string theories are able to avoid problems associated with the presence of pointlike particles in a physical theory. Detailed study of string theories has revealed that they describe not just strings but other objects, variously including points, membranes, and higher-dimensional objects. As discussed below, it is important to realize that no string theory has yet made firm predictions that would allow it to be experimentally tested.

The term 'string theory' properly refers to both the 26-dimensional bosonic string theories and to the 10-dimensional superstring theories discovered by adding supersymmetry. Nowadays, 'string theory' usually refers to the supersymmetric variant while the earlier is given its full name, 'bosonic string theory'.

Interest in string theory is driven largely by the hope that it will prove to be a theory of everything. It is one viable solution for quantum gravity, and in addition to gravity it can naturally describe interactions similar to electromagnetism and the other forces of nature. Superstring theories also include fermions, the building blocks of matter. It is not yet known whether string theory is able to describe a universe with the precise collection of forces and matter that we observe, nor how much freedom to choose those details the theory will allow.

On a more concrete level, string theory has led to advances in the mathematics of knots, Calabi-Yau spaces and many other fields. Much exciting new mathematics in recent years has its origin in string theory. String theory has also led to much insight into supersymmetric gauge theories, a subject which includes possible extensions of the standard model.

Wiki link http://en.wikipedia.org/wiki/String_theory