For all who enjoyed the Amherst College Symphony Orchestra's rendition of Ludwig van Beethoven's Ninth Symphony, here's a chance to hear Beethoven's Third Symphony performed by the 80-member orchestra at its Homecoming concert! Conducted by Music Director Mark Lane Swanson, the revolutionary Third Symphony, "Eroica," will be preceded by the overture to and two arias from the operetta "Die Fledermaus" by Johann Strauss Jr. (Fri., 8:30 p.m., Buckley Recital Hall. No admission charge.)

Four African performers from Simba Maasai Outreach Organization (SIMOO) will use song, dance, storytelling and discussion to entertain and teach about Maasai culture. Traditional African jewelry will also be sold, and all proceeds go toward SIMOO's efforts to improve water quality, food supply and education in their home community of Oloshoiboi, Kenya. (Thurs., 7 p.m., Studio 3, Webster Hall. No admission charge.)

The Pulitzer Prize-winning drama "Proof," written by David Auburn, will be performed as the senior project in acting of Catherine Macdonald '07E and William Unsworth '07E. Directed by Manuame Mukasa, this play centers around the daughter of a celebrated but troubled mathematician who finds she must prove her own mental stability to those close to her as she struggles to face the challenges of her changing world. (Thurs. through Sat., 8 p.m., Holden Theater. No admission charge.)

Join William Sweet as he talks about "Kicking Carbon: Global Warming and the Case for Renewable and Nuclear Energy." Based on and including readings from his eponymous book, the talk will explore his argument for removing coal, America's most abundant fossil fuel, from current energy consumption options. Sweet has contributed to Los Angeles Times, The New Republic and MIT's Technology Review, and is a senior news editor at the Institute of Electrical and Electronic Engineers' magazine Spectrum. (Wed., 4 p.m., Third floor conference room, Gordon Hall, UMass. No admission charge.)