Cats purr by flicking tiny muscles in their voice box about 20 to 30 times a second. They purr while breathing in and breathing out. The rumble can mean "I am happy," "I want food," or "I need comfort."
On this page: why cats purr, how they jump, how tails work, and how they land on their feet.
Read the answer below. In Giant, kids can keep asking the cat.
Kittens start purring almost as soon as they are born. They cannot see yet. The rumble says "I am here" to mom. Mom purrs back to say "you are safe." Happy cats purr on a lap. Hurt or worried cats can purr too. Some scientists think the shake, about 25 to 150 Hertz, may help bones and muscles feel a little better. Look at the whole cat. Soft eyes and a loose body usually mean calm. A tight body can mean the cat has a lot of feelings.
•Purring happens on the breath in and the breath out.
•It can mean happy, hungry, nervous, or sore.
•A fast purr mixed with a meow often means "feed me."
20–30/sec
Purr muscle flicks
5–6×
Jump vs body height
~230
Bones in a cat
~5 weeks
Righting reflex starts
How do cats jump so high?
A cat's back legs work like springs. The cat coils its body. Then those long back legs push off. A bendy spine adds extra stretch. Many house cats can jump about five or six times their own height from a standstill. That is fridge-top high. Cats also do not have a collarbone like ours. Their shoulders can slide forward, so the whole front follows the jump.
•Back legs store the power, then let it go.
•A flexible spine helps the cat coil and stretch.
•Soft paw pads help the landing after the leap.
How do cats' tails work?
A tail is a balance pole and a mood flag. In a jump or a skinny walk, it shifts like a tightrope pole so the cat does not tip. It also talks without words. A high tail is often a friendly hello. A puffed tail means "I am startled." A low twitchy tail can mean "I have feelings about this." One myth to drop: the tail is not the secret to landing on four feet. Cats with little or no tail can still twist in the air. The tail helps with steering and everyday balance. The twist uses the body.
How do cats land on their feet?
Cats have a righting reflex. Tiny parts in the inner ear tell them which way is down. Then the front half of the body turns. The back half follows in a special twist. The feet point at the ground. This starts around five weeks old. That does not mean cats cannot get hurt. Falls from high places can still injure them. If you live up high, keep windows safe. Never drop a cat to "see if it works."
•The inner ear senses up and down.
•The body twists in two parts, not like a stiff stick.
•Feet-first is not the same as safe.
In Giant
Kids ask the cat
In Giant, a child can talk with a cat about why it purrs, how it jumps, and how it lands on its feet.
