IAS-MAINS

As we know that our Universe is 13.8 billion year old ( I am not sure ) and our planet Earth is  about 4.5 Billion Year old. How life evolved on earth , According to research it was cyanobacteria, which was the first single cell  on the earth. then multicell evolved,  now different types of organism are living on earth. Every body is busy  in spreading knowledge through generations. lets discuss in detail. What is Sex ? Is it a pleasure that a living body needs , or it is a medium to spread Knowledge to offsprings .... Continue ..............