At the 2013 National Academy of Sciences Annual Meeting on April 27th-29th, Bill and Melinda Gates received the prestigious Public Welfare Medal for improving the lives of millions by applying science to some of the world’s most difficult global health challenges. In the words of Bill Gates, find out why he and Melinda were “talking to scientists about toilets” in his recap of the event on his website, a full transcript of the acceptance speeches he and Melinda gave, as well as a video of them delivering their speeches.

To view a video of Bill and Melinda’s acceptance speeches, click here.

For a recap of the event from Bill himself, click here.

For a full transcript of Bill and Melinda’s speeches, click here.

Visit the NAS website to learn more about the Public Welfare Medal and notable past winners.