Did you Know
...that all dogs, from the St. Bernard to the tiny Poodle, are direct descendants of wolves. They can all breed together and produce fertile offspring. Technically they are of the same species.
...It is a common belief that cats are color blind. However, recent research has shown that cats can see blue and green, and possibly red.
...that the amazing Swordtails can sometimes change from females to males? Swordtails first became aquarium fishes in about 1910. A few years later, it was reported that some females, after have several broods, had reversed sex - completely changing from females into fully functioning males!