Medicine 11 hours ago American scientists win Nobel Prize for the discovering of microRNA Their surprising discovery revealed an entirely new dimension to gene regulation as the microRNAs are proving to be fundamentally important for how organisms develop and function. US & World Videos 2:06 Patriots safety Jabrill Peppers charged in assault 2:10 Pre-holiday shopping: This may be the best week for deals 2:27 Why are there no Category 6 hurricanes? 1:13 What is Indigenous Peoples' Day? 1:38 Meghan Markle makes surprise appearance at Children's Hospital LA gala