ORAL administration of antibiotics such as penicillin, streptomycin, aureomycin and chloromycetin is known to stimulate the growth of mammals 1 and birds 2. So far, no analogous work appears to ...

Such chemical signals, called pheromones, often allow males and females of the same species to recognize each other before mating. Since the discovery of the very first pheromone in the silkworm moth ...