Lowrie-Shaw House, built in 1828 by Walter Lowrie, Butler's only United States senator, at 123 W. Diamond St., will be open May through September from noon to 4 p.m. Mondays, Wednesdays and Fridays, except legal holidays. Admission is $3 for adults, $1 for children ages 5 to 17. Call 724-283-8116.

Harmony Museum, 218 Mercer St., Harmony, will host James Adovasio, founding director of Mercyhurst Archaeological Institute at Erie's Mercyhurst College and co-author of the book "The Invisible Sex," for a lecture Saturday at the museum's Stewart Hall. Admission is free for Adovasio's presentation at 7 p.m. He will discuss his newest book that unveils the important but previously ignored roles and contributions of women as the human race developed throughout the Stone Age. He will also sign copies of his book, which cost $29. Call 724-452-7341 or 888-821-4822, or visit the Web site, www.harmonymuseum.org.

Providence Plantation will host "How the West Was Won" at 7 p.m. Saturday and Sunday at the plantation, 300 Textor Hill Road, Evans City. Cost is $10 for adults and $5 for children age 12 and younger. Dinner following the program costs an additional $15 for adults and $7.50 for children. Call 724-538-8818 to make reservations, or visit the Web site, www.frontier-history.org.

<B>Carnegie Science Center</B>, One Allegheny Ave. next to Heinz Field on the North Side, concludes "Bodies...The Exhibition" on Sunday; an extra fee is assessed for this display. Hours are 10 a.m. to 7 p.m. Fridays and Saturdays and from 10 a.m. to 5 p.m. Sundays through Thursdays; closed holidays. Admission to the science center is $14 for adults and $10 for senior citizens age 62 and older and children 3 to 18. Parking is $3; people not visiting the science center pay more. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.<B>Heinz History Center</B>, 1212 Smallman St., presents "Pittsburgh Recast," featuring work by members of the Pittsburgh Society of Illustrators through Sept. 7. Formed and Fired: Three Ceramic Traditions is on display in the center's first floor McGuinn Gallery through May 18. Hours are 10 a.m. to 5 p.m. daily, except holidays. Admission includes both the center and sports museum and is $9 for adults, $7 for senior citizens older than 61, $5 for students with ID and for children ages 6 to 18. Call 412-454-6000.<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, continues "Secrets of Circles," exploring the math, science and beauty behind the familiar shape. Hours are 10 a.m. to 5 p.m. Mondays through Saturdays and noon to 5 p.m. Sundays. Regular admission is $9 for adults, $8 for children ages 2 to 18 and senior citizens. Call 412-322-5058 or visit the Web site, www.pittsburghkids.org.<B>Carnegie Museum of Natural History</B>, 4400 Forbes Ave. in Oakland, continues "Time Machines: Watches from the H.J. Heinz Collection" through July 6. Admission is $15 for adults, $12 for senior citizens, $11 for children ages 3 to 18 and full-time students with ID, and free to Carnegie Museums members. Hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays, 10 a.m. to 8 p.m. Thursdays, noon to 5 p.m. Sundays. C all 412-622-3131 or visit the Web site, www.carnegiemnh.org.