The American Red Cross will host a blood drive from 10 a.m. to 4 p.m. today in Pasquerilla Spiritual Center. The Center for Ethical and Religious Affairs and Navigators will sponsor the event.

The Department of Geography will host a coffee hour at 4 p.m. today in 112 Walker Building. Rob Crane of the Department of Geography and AESEDA will speak about "Future Climates for Sub-Saharan Africa."

The Department of Computer Science and Engineering will host the University of Michigan's Martin Strauss in a speech about "Secure Multiparty Computation of Approximations: A Survey" at 10 a.m. today in 113 Information Sciences and Technology Building.

Donald Marolf of the University of California will speak at 11 a.m. today in 320 Whitmore Laboratory about "Rindler Horizons and the Physical-Process Second Law." The Institute for Gravitation and the Cosmos will host the event.

Penn State's Rebecca Corwin will speak at 11:15 a.m. today about "Clinical and Mechanistic Relevance of Bingeing Rats" in 127 Noll Library. The Intercollege Graduate Program in Physiology will host the event.

Subba Reddy Palli of the University of Kentucky will speak at 11:15 a.m. today about "Insect Metamorphosis: Basic Research to Applications" in 107 Agricultural Sciences and Industries Building. Kelli Hoover of the Department of Entomology will host the event.

The Department of Crop and Soil Sciences will host a seminar at 12:20 p.m. today in 101 Agricultural Sciences and Industries Building. Penn State's Mary Carol Frier will speak about "The Economic Potential of On-Farm Processing of Canola Into Oil and Meal in Pennsylvania."

Penn State's Jeffrey J. Kern will speak at 12:20 p.m. today in 112 Buckhout Laboratory about "The Effects of Temperature and Leaf-Wetness Duration On Gray-Leaf Spot Disease Development on Kikuyugrass." The Department of Plant Pathology will host the event.

Susan Brantley of Penn State will speak at 2:30 p.m. today in 341 Deike Building. Penn State's Astrobiology Research Center will host the speech, "Microbial Biosignatures, Part One: Mars Weathering as a Biosignature."

The Physical and Mathematical Sciences Library will show two videos, Mysterious Poison: The History of Polychlorinated Biphenyls and How Scientists Look at the Sun at 3:35 p.m. today in 211 Davey Laboratory.

New York University's Olof Widlund will speak at 3:35 p.m. today in 106 McAllister Building. The Department of Mathematics will host the event.