Google Chief Economist, Hal Varian.

Participants in Relay for Life warm up for the group Zumba exercise Saturday evening on Johnson Track. The event ran from 6 p.m. Saturday evening to 6 a.m. Sunday morning. For more photos.

Relay participants dance in a group Zumba exercise, one of the team activities that occurred during the night.

Royal K. Morris ’15 performs with the MIT Chorallaries.

Samuel P. Heilbroner ’13 performs a solo on the alto saxophone. The MIT Festival Jazz Ensemble, directed by Frederick Harris, celebrated its 50th anniversary of Jazz at MIT with “Homegrown for 50 Years!” on Friday, March 8, 2013.

Jeanne M. Yu ’13 performs with Syncopasian, one of MIT’s co-ed a cappella groups Saturday evening.

One of the many fundraising booths at the Relay for Life event.

Members of Mocha Moves perform during the Relay event on Johnson Track.

Students in ADT, the Asian Dance Team, perform a traditional Chinese dance.