Non-native species introduced by humans are among the main causes of global species decline -- they were partly responsible for 60 percent of the species that have become extinct worldwide in recent ...

Add Yahoo as a preferred source to see more of our stories on Google. Who walked through the snow here? Would you have guessed it was a pigeon and a cat? Then be sure to test your knowledge in our ...

An international team of scientists has recently found that non-native species are expanding their ranges many orders of magnitude faster than native ones, in large part due to inadvertent human help.