Interesting and Unbelievable Facts

There are more than 6,000 species of lizards. Lizards are present all over the world except  Antarctica  and extreme northern parts of the Northern Hemisphere. Apart from four legs and feet in most lizards, they are  distinguishable from snakes  through the presence of external ears, movable eyelids, two lungs ( snakes have a single lung), and less flexible jaws. ( Source ) Thorny Devil, a desert lizard, uses its feet and skin to sip water  from the sand. ( Source ) All the members of Whiptail lizards are female. They can  reproduce without male lizards,  thanks to the presence of extra chromosomes. ( Source ) Lizards can  detach their tail  for defense purposes. Most of them can re-grow their tail several times. But few lizards, like crested geckos, can not grow back their tail after losing them once. ( Source ) The size of lizards may vary. They can be as small as just a few cm in length (geckos and chameleons), while some can reach up to 3 meters ( Komodo dragon ). Geckos

Mules are the  offspring of a male donkey and a female horse. The mating of male horses and female donkeys produce hinnies. Both mules and hinnies can be male or female. Both mules and hinnies are almost always sterile . It is mainly due to uneven chromosomes (63) as a result of the different number of chromosomes in a horse (64) and donkey (62). ( Source ) But exceptions to this rule have been seen. There are a few recorded cases where mare (female) mules and hinnies gave birth to babies. ( Source ) Mules are superior to horses in several ways. They are more intelligent, healthier, and live longer than horses. Mules are also surefooted and can perform better than horses in hostile terrain. ( Source ) Mules are generally taller and faster than donkeys. The sound produced by mules is a mixture of a horse and donkey’s sound. Due to several vital qualities, humans have  used mules  in wars and for other difficult jobs since ancient times. Mules are used for difficult jobs China