COCKROACHES...

Cockroach is a kind of insect which is useless and you would probably kill them when you find them in your room. Well once upon a time crawled a baby cockroach ( don't realy know whether it's a baby cockroach or just a little kind of cockroach) into my room. Lucky for it, at that time i didn't feel like killing it instantly, so what i did was  covered the cockroach with a plastic glass instead. I really thought that it would be dead within a few hours, buuuuuuuuuuuttttttttt.....no it didn't. it's not even dead now, and that's like 3 weeks passed. just imagine a month without no food and no drink and no air and it's still alive.wow...

then this morning when i woke up, i got the idea to google around on cockroaches, and this is what i've found...

The favourite food of the cockroach is actually the glue on envelopes, the glue bindings at the backs of books and the glue on the back of postage stamps.

A cockroach can hold it's breath for up to 40 minutes.

Some female cockroaches mate once and are pregnant for the rest of their lives

Cockroaches rest for approximately 75% of each day.

Young cockroaches only need a crack about 0.5mm wide to crawl into your house. Adult males can squeeze into a space of 1.6mm.

Cockroach can live for up to a month, without its head.

Most species come from tropical countries and therefore need to be kept at a minimum of 25 degrees centigrade to survive.

The world's largest roach (in South America) is six inches long with a one-foot wingspan.

Male cockroaches transfer sperm to females in a package called a spermatophore. Some males cover the package in a protein-rich wrapping that the female can eat to obtain nutrients to raise her young. 

Female cockroaches however prefer their males at the bottom of the social pecking order while the dominant males try and stop them from having their way. But when females do mate with low-ranking cockroaches, they produce fewer sons in an effort to avoid passing on his lower level genes.

Cockroaches can run up to 3km/hr (0.8 m/s).

There are estimated to be 4,000 - 5,000 species of cockroaches in the world. Of these, only 25 to 30 are considered pests. The rest remain a part of the Earth's fauna, such as the Giant Burrowing Cockroach which are clean, slow moving, and are sometimes kept as pets. 

The German Cockroach - In Germany it is sometimes called "Die russische Schabe" or "The Russian Roach". In Russia it is called the Polish Roach. In America it was called the Crotton Bug because it came to NY about the time the Crotton Aqueduct was built.

The American Cockroach is thought to have originated in North Africa The most likely scenario is that it reached the Americas during the early slave trade.
I've also heard that they are sometimes called "water bugs" in the U.S. although I have no idea why. Mind you, the word cockroach as a name isn't exactly apparent either.

The Madagascar Hissing Cockroach is a large, wingless cockroach from Madagascar. Males ram into each other with their horns and/or they push each other with their abdomens. Larger males usually win. 
The winners of these encounters usually hiss more than the losers. The hisses of males also contain information about the size of the male hissing and may be used to assess the opponent's size. 

Ever wondered what the supposed purpose of having cockroaches on the planet at all is? Well try this handy example of a coackroaches supposed usefulness:
Crushed cockroaches can be applied to a stinging wound to help relieve the pain.

Scientifically speaking cockroaches are known as Blattodea, but personally I'd like to see them all Flattodea!