Sierra Leone

Health & Medicine

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.”

Health & Medicine

How 'big data' could help stop the spread of Ebola

When it comes to containing an outbreak like Ebola, anticipating where it might spread next is crucial. Until somewhat recently, however, the only way to do that was through untimely census records. But with the proliferation of so-called "big data," epidemiologists can track in real time where West Africans are headed — and where they might be spreading the disease.

Global Scan

An ancient lost Mayan city reappears in Mexico

The Mayan civilization thrived more than a thousand years ago. Many of its cities simply disappeared as jungle overtook them. One of them was found decades ago and then lost again, until now. We also report on why women may be bearing the brunt of Ebola's attack in West Africa, and how Syrian cyber-warriors are using viral clickbait to trap enemies of the Syrian regime. All that and more, in today's Global Scan.

Health & Medicine

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.”

Global Scan

Could this trout really be as smart as a chimp?

Scientists have long thought there were certain signs of intelligence only shared by humans and chimpanzees. So they were startled to find one of those characteristics in a fish — a very smart fish, yes, but still a regular old coral trout. Meanwhile in Africa, Gambian legislators plan to increase the punishment for anyone convicted of being habitually gay to life in prison. And a doctor discusses the cruel impact of Ebola in Africa, in today's Global Scan.