This program, Ending the Epidemic: Science Advances on AIDS, brings together leading researchers on the forefront of scientific efforts to understand and attack the virus that causes AIDS. Moderator Richard …

We look around us—constantly. But how often do we listen around us? Sound is critically important to our bodies and brains, and to the wider natural world. In the womb, we hear before we see.

How fast is the universe expanding? Two prominent approaches are finding different answers, propelling cosmology toward a crisis. Wendy Freedman, a renowned astronomer who has spent decades seeking the expansion …

Are the laws of physics real, or are they human inventions? This is one of many questions Brian Greene and Sean Carroll explore at the very edge of understanding, where …

Every successful scientist seems to have a “once in a blue moon” discovery during his or her lifework: an accident or epiphany that unexpectedly leads to a serendipitous breakthrough. Geneticist …

Time allows us to live in the moment, reflect on the past, plan for the future. It’s our most familiar, precious, yet mysterious commodity.