David Quammen

Science

Charles Darwin's 'tree of life' gets a new look

The Tree of Life proposed by Charles Darwin in the 19th century depicts different forms of life diverging from one another as they evolve down through successive generations. But discoveries of new life forms and the phenomenon of horizontal gene transfer indicate life can also evolve through convergence.

Health

We still don't know for sure how Ebola reached humans

Scientists are still trying to figure out when and how the Ebola virus first emerged in humans. Many believe that fruit bats are the so-called “reservoir hosts,” but that remains to be definitively proven. Science writer David Quammen ventured deep into the forest of central Africa to try to find out for his latest book “Ebola: The Natural and Human History of a Deadly Virus.”

Arts, Culture & Media

Geo answer

The answer to today's Geo Quiz is the Kamchatka peninsula in Russia's far east. Anchor Marco Werman speaks with David Quammen who wrote about this remote area ?where salmon rule? for this month's National Geographic.

Arts, Culture & Media

Geo answer

The answer to today's Geo Quiz is the Kamchatka peninsula in Russia's far east. Anchor Marco Werman speaks with David Quammen who wrote about this remote area ?where salmon rule? for this month's National Geographic.

Health

We still don't know for sure how Ebola reached humans

Scientists are still trying to figure out when and how the Ebola virus first emerged in humans. Many believe that fruit bats are the so-called “reservoir hosts,” but that remains to be definitively proven. Science writer David Quammen ventured deep into the forest of central Africa to try to find out for his latest book “Ebola: The Natural and Human History of a Deadly Virus.”

Science

Charles Darwin's 'tree of life' gets a new look

The Tree of Life proposed by Charles Darwin in the 19th century depicts different forms of life diverging from one another as they evolve down through successive generations. But discoveries of new life forms and the phenomenon of horizontal gene transfer indicate life can also evolve through convergence.