How DID scientists bring an extinct worm back to life? Step-by-step process that saw ancient creature reawakened after 46,000 years (and why we can't resurrect cavemen)

It might sound like something out of a Hollywood sci-fi movie -- bringing a 46,000-year-old frozen worm'back to life' after digging it up in Siberia. But that is exactly what scientists revealed they had done in a landmark study published yesterday. The experts managed to'resurrect' a long-extinct roundworm from a hibernation-like state known as cryptobiosis, which allowed it to survive the harsh frozen temperatures. Scientists previously thought that roundworms could only remain in this state for less than 40 years, so the development was an eye-opening moment for the scientific world. So, how exactly did they do it?