Portugal has been a popular relocation destination for a decade. A mix of lifestyle, tax and residency incentives have drawn ...

Each year, millions of monarch butterflies travel thousands of miles across North America to escape the cold and find ...

"There are many repercussions if black bears stay awake too long or skip hibernation." Researchers stunned by bizarre ...

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.