Three Roads to Quantum Gravity
Lee Smolin
Published in 2001
There is nothing outside the universe 17
In the future we shall know more 26
Many observers not many worlds 33
The universe is made of processes not things 49
What we have learned 67
Black holes and hidden regions 69
Acceleration and heat 77
Black holes are hot 88
Area and information 95
How to count space 106
Knots links and kinks 125
The sound of space is a string 146
The present frontiers 167
The holographic principle 169
How to weave a string 179
What chooses the laws of nature? 194
A possible future 207
Postscript 212
Glossary 226
Suggestions for further reading 235
Index 241