Science Friday (known as SciFri for short) is a weekly call-in talk show that is part of NPR's Talk of the Nation radio program. SciFri is hosted by award winning science journalist Ira Flatow and was created and is produced by ScienceFriday, Inc. The program is divided into two, one-hour programs. The focus of each program is nature, science, and technology and the news and information. Each week 1.3 million listeners tune into the program.
Science Friday is also available in a podcasting format and is one of the most popular iTunes downloads, frequently in the top 15 downloads each week. SciFri podcasts are downloaded over 23 million times per year and over 1.3 million listeners tune in each week to hear the program. It is also carried via Sirius/XM satellite radio. In addition to the program, SciFri creates original videos and educational materials, all available on its website.
The program's slogans are “Making Science User Friendly” and "Making Science Radioactive."
SciFri broadcasts excerpts from the annual Ig Nobel Prize ceremony on the Friday after Thanksgiving.
Science Friday maintained an island (Science Friday Island) in Second Life, including an open air theater with live audio and video feeds of the broadcast. But that venue is no longer in operation.