All cats are born blind. The ability to see comes during the first couple of weeks after birth! Cats have rudimentary nonfunctional collar bones that allow them to squeeze themselves through tight spaces and helps them in their balance and stride! Cats often have a third eyelid that is not normally visible to us. If you are seeing it more often - the cat may be ill!

Cat vision is similar to humans in daylight, but they can see six times better than us in dim light - owing to larger pupils and the ability to gather light at the back of the eye owing to a reflective retinal surface!
Field of vision in cats is slightly compromised for a more binocular vision, that grants them greater depth perception and ability to judge their prey's position more precisely for pouncing upon them in high speed pursuits!

Cats' sense of smell is fourteen times stronger than ours - this means they can smell the odour in the litter box much earlier than us!
Cats' hearing is also very good. They are able to hear sounds of higher pitch than us and dogs. Thirty two individual muscles in their ears allow them to pinpoint the exact location of a source of sound!

The individual positioning of whiskers is unique to all cats - they are like finger prints. Whiskers also allow cats to feel their way in extreme dark and since their span, when fully erect, is nearly equal to cats' body width - it allows cats to judge whether a space or passage is too narrow for them! Whiskers also are usually indicative of cat behavior. Erect, forward pointing whiskers indicate that the cat is excited, animated. Whereas laid back whiskers are often seen in resting, defensive conditions!

Cats have sharp pointed teeth that are built for killing prey by suffocation/severing of spine. A cat's teeth are its greatest asset in the wild. In proportion to body size, the elusive Clouded Leopard has the longest canines in the family felidae, whereas the Jaguar has the strongest jaws - I have seen it bite through the shell of turtles in documentaries!
Cats have more spines than us since they also have spines in their tail. Next time you see a kid pulling a cat's tail - stop him - since it hurts. Their vertebrae are also more loosely connected to each other than ours, allowing them great flexibility!

Flexibility of the spine is highlighted in the Cheetah - the fastest land mammals. With big adrenals, flexible spine and a rudder-like tail, Cheetah can outpace everything on African savanna! Tiger is the largest feline on earth. An adult Siberian tiger may weigh up to eight hundred pounds and is one of the top predators on earth. Tigers are excellent swimmers and are in fact the only cat who seem to enjoy stepping in water (the Jaguar in Americas frequently go into water to hunt baby alligators and anacondas)!

Lion is the only cat that lives in groups, called prides. The only social cat, family life gives lions edge over other felids by virtue of their cooperative hunting! Leopards are highly secretive and are perhaps the best tree climbers and individual hunters amongst big cats.