Wonderfest: Life's Information: Evolution before LUCA

All known lifeforms rely on the same molecular mechanism to translate information carried by DNA and RNA into proteins. This translation is accomplished by an incredibly complex system involving many dozens of very large and precisely interacting molecules. All viruses, bacteria, plants, and animals ultimately inherited this common molecular machinery from our Last Universal Common Ancestor (LUCA). But all of this ??" and much more ??" had to evolve prior to LUCA. Without this translation machinery, the “genetic code” isn’t information about anything! So, origins-of-life theories can’t just assume that DNA and RNA intrinsically have information. Even the most widely accepted “RNA-World” origin-of-life theory begs the question: What is the origin of life’s information?

Our speaker, Dr. Terrence Deacon, is Professor (Emeritus) of Anthropology at UC Berkeley.