Cockroaches are found to be present with human beings since 40000 years !! But they are present on earth for almost 32 crores years !!!!
There are around as many as 4600 species of cockroaches found across the earth. Out of which 30 are found to be present with human vicinity.
Female cockroach can carry around 30 – 40 thin eggs in a capsule shaped case. Egg to adult cycle is about 3 – 4 months & generally have a life cycle of around 1 year. In some cases female need to be impregnated only once to be able to lay eggs for rest of the life.
Cockroaches are one of the hardiest species & can live without food for a longer period. They can also live without air upto a period of 45 minutes.
It’s popularly told that Cockroaches can still survive on earth if humanity destroys due to Nuclear war.