91色情片

Max Tegmark is reading his diary from ten years ago. That鈥檚 when he鈥檚 not at
the University of Pennsylvania, using astrophysical measurements to calculate
the age, contents and shape of the Universe. Tegmark confesses that he doesn鈥檛
take heavy books with him on his travels鈥攐r even light ones. He prefers a
newspaper: on his last journey he read the International Herald Tribune. Tegmark
fears he may hold the record for the longest time taken to read one book. Three
years ago he began Steven Weinberg鈥檚 series, The Quantum Theory of Fields. The
third volume (on supersymmetry) is published by Cambridge (拢32.50, ISBN
0521660009).