Scientists from South Africa and Brazil have provided empirical evidence that pollen grains of rival plants may compete with one another for space on pollinators, thus influencing whose pollen is going to make it to the next flower—or not. Scientists from South Africa and Brazil have provided empirical evidence that pollen grains of rival plants may compete with one another for space on pollinators, thus influencing whose pollen is going to make it to the next flower—or not. Evolution Ecology Phys.org – latest science and technology news stories