new evidence suggests that evolution of birds and mammals in the temperate zone is faster than in the tropics, contrary to an earlier theory that said tropics were more favourable. It has been believed that since the tropics have more number of species, the rate of evolution is more in this region. Scientists at the University of British Columbia now say that tropics have more number of species because the rate of extinction of species is less there.
Faster temperate In a paper published on March 15 in Science, they proved through dna analysis of closely related species that speciation