with Jorge Conde (@jorgecondebio), David Reich, and Hanne Tidnam (@omnivorousread) Trying to reconstruct the deep past of ancient humans out of present-day people has until now been like trying to reconstruct a bomb explosion in a room from bits of shrapnel, says David Reich, Professor of Genetics at Harvard Medical School and author of the new book, Who We Are and How We Got Here: Ancient DNA and the New Science of the Human Past. But technological advances and new tools available only in the last few years have suddenly revolutionized this field, opening up an entirely new window into the past as well as our present humanity. image: Ben Casey, Wikimedia Commons