Day two of the Democratic National Convention in Philadelphia. This episode: host/campaign reporter Sam Sanders, congressional correspondent Susan Davis, and political editor Domenico Montanaro. More coverage at nprpolitics.org. Email the show at [email protected]

Day one of the Democratic National Convention in Philadelphia. This episode: host/campaign reporter Sam Sanders, campaign reporter Asma Khalid, and editor/correspondent Ron Elving. More coverage at nprpolitics.org. Email the show at [email protected]

Virginia Senator Tim Kaine will be Hillary Clinton's running mate as the Democratic nominee for Vice President. This episode: host/campaign reporter Sam Sanders and White House correspondent Tamara Keith. More coverage at nprpolitics.org. Email the show at [email protected].

Day four of the Republican National Convention in Cleveland. This episode: host/campaign reporter Sam Sanders, campaign reporter Sarah McCammon, and editor/correspondent Ron Evling. More coverage at nprpolitics.org. Email the show at [email protected]

Aging is inevitable. We can slow it down a little, but could we ever bring it to a grinding halt? In this episode, TED speakers explore how we all might live longer and even better lives. (Original broadcast date: May 22, 2015).

Day three of the Republican National Convention in Cleveland. This episode: host/campaign reporter Sam Sanders, campaign reporter Asma Khalid, and political editor Domenico Montanaro. More coverage at nprpolitics.org. Email the show at [email protected]

Day two of the Republican National Convention in Cleveland. This episode: host/campaign reporter Sam Sanders, congressional correspondent Susan Davis, and editor/correpsondent Ron Elving. More coverage at nprpolitics.org. Email the show at [email protected]

Day one of the Republican National Convention in Cleveland. This episode: host/campaign reporter Sam Sanders, congressional correspondent Susan Davis, and political editor Domenico Montanaro. More coverage at nprpolitics.org. Email the show at [email protected]

More than 80 people are dead after a man driving a truck crashed through a crowd of people celebrating Bastile Day in Nice, France. Donald Trump quickly said he would delay announcing his running mate, then did announce his running mate, Indiana Governor Mike Pence. This episode, host/White House correspondent Tamara Keith and political editor Domenico Montanaro. More coverage at nprpolitics.org. Email the show at [email protected].

For thousands of years, we've searched to answer the question: Who are we? Today, science has brought us closer than ever to the answer. This hour, TED speakers share ideas on what makes us ... us.