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Gordon Hempton, who calls himself the Sound Tracker, is an "acoustic ecologist" who has traveled the world recording the sounds of nature, from birdsong and rainfall to babbling brooks and the rustling of leaves. But the noise we humans make is making it harder to find those quiet places - and, he says, it's having real consequences for wildlife as well. Bernie Krause, a musician and sound recordist, has become an audio anthropologist, documenting the sounds of nature. He also has noticed dramatic changes in some areas, such as in a Costa Rican rain forest. He helps correspondent Lee Cowan (and us) listen to the difference.

On May 1, 2015, while vacationing in Mexico, the husband of Sheryl Sandberg, the chief operating officer of Facebook, died suddenly; Dave Goldberg was just 47. Then known for her bestselling 2013 book "Lean In," which urged women in the workplace to stand up for themselves, Sandberg unexpectedly found herself confronting her toughest challenge, as a single mother of two young children. In an emotional and wide-ranging interview, Sandberg talks with "CBS This Morning" co-anchor Norah O'Donnell about how she and her children worked together to move forward after the loss. She also talks about coping with grief and other life lessons she explores in her new book, "Option B: Facing Adversity, Building Resilience and Finding Joy," co-written with friend and psychologist Adam Grant.

The career of Lin-Manuel Miranda, the Pulitzer- and Tony Award-winning creator of the Broadway sensation "Hamilton," has benefited from grants from the National Endowment for the Arts, one of the government agencies threatened with elimination by the Trump administration. A strong proponent of arts education, especially when it comes to kids in underserved regions of the country, Miranda spoke with Erin Moriarty and "Sunday Morning" about the importance of federal funding for the arts.

Increasingly, we Americans occupy alternate universes, with very little common ground -- only battling perceptions of reality. A Pew study finds 81% of voters say they cannot agree with the other side on basic facts, and in this age of the Internet and cable TV, very little is out of bounds. Ted Koppel talks with Fox News host Sean Hannity, New York Times executive editor Dean Baquet, White House Press Secretary Sean Spicer, and Norman Ornstein of the American Enterprise Institute about the state of political discourse today.