Skeletal remains found by an international team, in a cave about 30 miles northwest of Johannesburg South African cave may yield new clues to human development and answer key questions of the evolution of the human lineage. The team consisting of members from U.S., African, European and Australian universities, named the new species, Australopithecus sediba, in April 2010. They found skeletal remains in a cave of many individuals of Australopithecus sediba possibly belonging to a family group. They all seemed to have died suddenly in the same event about …

Introduction and History of RNAi
The phenomenon of RNA interference (RNAi) was discovered for the first time in nematode Caenorhabditis elegans. Subsequently RNai mechanism was also found to be conserved in different organisms ranging from plants to Drosophila and Humans. RNAi is a well conserved sequence specific gene silencing mechanism induced by double stranded RNA (ds RNA), resulting in degradation of the targeted mRNA. It plays a pivotal role in regulation of gene expression, participates in defense against viral infections, and keeps jumping genes under control. While RNAi is an endogenous …