Polish researcher, Piotr Wołkowski discussed the book by Lee Smolin published in 1999. Five physics problems of that time were listed, including quantum gravitation. As usually happens with revolutions, scientific progress is completely unpredictable. This is also applicable today, when from 2003 we had no idea about dark matter and energy, and a number of more trivial problems like high-temperature superconductivity. Probably, as I say in paper published in Lodz University proceedings, we need new mathematics. More: it is already somewhere present and it would be enough to know - where.
Article Problematycznie o problemach wspóøczesnej fizyki