Kin

The Evolutionary Roots of Life: A New Understanding of Our Microbe Relatives In 1970s biologists made a groundbreaking discovery that revolutionized our understanding of life on Earth. By uncovering the shared history of proteins in all cells, they opened up new avenues for research and changed the way scientists think about the living world. This book tells the story of these remarkable breakthroughs and how they led to a deeper understanding of our connections to the diverse life forms known as microbes. The discovery of the archaea, a group of organisms previously thought to be bacteria, was a major milestone in this journey. But it was the construction of the Tree of Life that has had the most profound impact. This evolutionary project, dreamed about by Charles Darwin over a century ago, has given us a new way of understanding the relationships between all living organisms. The tree's three main stems are dominated by microbes, and knowing its structure has allowed scientists to characterize the complex array of microbial populations that live in and on us. This knowledge not only helps us understand how microbes contribute to health and disease but also sheds light on one of the biggest questions in science: how did life on Earth begin, over 3.5 billion years ago?