Look around you: Our communities are filled with people in their 60s, 70s, 80s, even 90s, doing things that would have been unthinkable at their age a generation ago. By 2030, the entire Baby Boomer generation will be 65 and older.  By mid-century, more than 80 million Americans will be over the age of 65.  By any prevailing definition, the United States will be a country full of older adults.  But what does it mean to be old in an era of much longer life?    Welcome to Century Lives: The New Old, from the Stanford Center on Longevity! I’m your host, Ken Stern. In this season, we interview six extraordinary people who are challenging the way we think about aging—and inspiring new ways we can live our supersized lives.Today: Billy Collins. He is one of America’s best-known poets, whose poems are beloved for their conversational and accessible style and for their humor. Billy Collins was the Poet Laureate of the United States for two terms, from 2001-2003. He talks here about his new collection of poems about dogs, and about a lifetime of observing the world around him and finding the right words to describe it. He also discusses mortality, which he says is one of poetry’s most common topics. And he reads several of his poems for us!