Showing results by author "David Quammen" in All Categories

In the mid-1970s, scientists began using DNA sequences to reexamine the history of all life. Perhaps the most startling discovery to come out of this new field is horizontal gene transfer (HGT), or the movement of genes across species lines. For instance, we now know that roughly eight percent of the human genome arrived not through traditional inheritance from directly ancestral forms, but sideways by viral infection - a type of HGT. In The Tangled Tree David Quammen chronicles these discoveries through the lives of the researchers who made them.

Our understanding of the ‘tree of life’, with powerful implications for human genetics, human health and our own human nature, has recently completely changed. This book is about a new method of telling the story of life on earth - through molecular phylogenetics. It involves a fairly simple method - the reading of the deep history of life by looking at the variation in protein molecules found in living organisms. For instance, we now know that roughly eight percent of the human genome arrived not through traditional inheritance from directly ancestral forms, but sideways by viral infection.

When Soviet agent Viktor Tronko defected to the US in 1964, he made two intriguing claims: he insisted that Russia had not placed a mole inside the CIA, and that Lee Harvey Oswald had not been recruited to assassinate the president. Convinced that Tronko was working as a disinformation agent, the CIA furiously did everything they could to break him. But Tronko had one more surprise for them: he refused to break.