World Topics

Apr 15, 2015

Report urges ways to stay sharp as our brains age

The brain ages just like the rest of a body, says a new report that urges seniors to take steps to keep sharp. The prestigious Institute of Medicine examined what scientists know about “cognitive aging,” changes in mental functioning as we get older. This ...

Apr 15, 2015

Sierra Leone schools reopen as Ebola scare subsides

Sierra Leone’s 1.8 million children prepared Tuesday to return to school, eight months after classes were shut to halt the spread of the deadly Ebola virus. Classrooms have been empty since the government announced a state of emergency last July in response to an ...

Apr 12, 2015

Canada glaciers may shrink by 70% by 2100

The glaciers of western Canada, one of the world’s most picturesque mountain regions, are likely to largely melt away over just three generations, scientists say. By 2100, the glaciers of Alberta and British Columbia are set to shrink by 75 percent in area compared ...

North, South America joined earlier than thought

Apr 12, 2015

North, South America joined earlier than thought

North and South America joined together between 13 and 15 million years ago — some 10 million years earlier than scientists previously thought, a new study says. The two continents were once separated by a deep strait called the Central American Seaway, which at ...