They arrived at the death camps primarily by train and countless people died inside the cramped boxcars. RUSSIA DEMANDS NASA EXPLANATION OVER SNUB OF SPACE CHIEFThe research suggests that the Nazis killed their victims during this window of time at astonishingly high rates -- roughly 15,000 people per day. Some other researchers have said the study's death rate estimates are too high. "The Holocaust stands out as a demonstration of how the efficient machinery of government was turned on people in an unparalleled way," Stone writes in The Conversation. "This is the key lesson of the Holocaust that I believe must not be forgotten."

Source: Fox News January 07, 2019 12:06 UTC