Plus, we take your calls on viruses, vaccines, and variants on "Ask The Docs," and uncover how billionaires avoid paying taxes on their wealth with Chuck Collins, author of The Wealth Hoarders: How Billionaires Pay Millions to Hide Trillions.

We take listener questions with Dr. Sabrina Assoumou, infectious disease specialist at Boston Medical Center, and Dr. Shira Doron, infectious disease physician and hospital epidemiologist at Tufts Medical Center.

To discuss her new book, "All That She Carried," we're joined by Tiya Miles, a history professor and Radcliffe Alumnae Professor at the Radcliffe Institute for Advanced Study at Harvard.

MBTA General Manager Steve Poftak answers listener calls, and talks about the existential threat of climate change and the challenges in bringing service back to pre-pandemic levels.

Plus, we check in with MBTA General Manager Steve Poftak, and discuss Harvard historian Tiya Mile's new book, All That She Carried.

We speak with WBUR reporter Simón Ríos and Julie Wormser, Deputy Director at the Mystic River Watershed Association.

We dive into the powerful history of Juneteenth with Pulitzer Prize-winning historian Annette Gordon-Reed.

We discuss "Boston Under Water," a new WBUR series that kicks off today, exploring the issue of sea-level rise, our vulnerability to it and what's being done to mitigate it.

Plus, we look at the powerful history of Juneteenth with Pultizer Prize-winning historian Annette Gordon-Reed.

The race for governor is heating up as Harvard professor Danielle Allen plans to announce her campaign for governor on Tuesday. But can any candidate topple Governor Baker if he seeks a third term? Joining us to discuss is WBUR Senior Political Reporter, Anthony Brooks.