Lawrence Livermore National Laboratory scientists George Caporaso and Steven Hawkins will be the speakers at a 6 p.m. discussion during the Las Positas College annual Science and Engineering Seminar Series. The program will be held in room 2420 in the college's Lecture Hall. There is no charge for admittance but visitors are reminded that the campus has a $2 parking fee. Daily tickets are available from vending machines in the campus parking lots. For more information, contact Biology Professor Nan Ho at 925-424-1344.

Are you receiving Express, our free daily e-mail edition? See a sample and sign-up for Express.