We have changed how we collect and accept calendar information. Readers must now submit all items through our website. Go to events.contracostatimes.com. Click on "submit your event." You'll have to register at this point, and enter your event. You do not have to pay. Submitting your event in this way will ensure it is part of our easy online searchable database, as well as a candidate for space in our publications.

Habitot for Adults. Adults get a chance to play at Habitot Children's Museum with the after-dark event "Let the Big Kids Play" featuring beatbox cello funk by CelloJoe, beer, and more. 6:30 to 10 p.m. April 4. Habitot Children's Museum, 2065 Kittredge St. $15-$20. RSVP requested. 510-647-1111 x 17, letthebigkidsplay.eventbrite.com, www.habitot.org.

Author Mary Roach. America's most entertaining science writer, Mary Roach, discusses and signs copies of her delectable new bestseller, "Gulp: Adventures on the Alimentary Canal." 7:30 p.m. April 4. Pegasus Books, 2349 Shattuck Ave. Free. 510-649-1320, www.pegasusbookstore.com.

Author Chris Ertel. Author Chris Ertel cracks the code on what it takes to design creative, collaborative problem-solving sessions that soar with the indispensable guide, "Moments of Impact." 7 p.m. April 4. Books Inc., 1760 Fourth St. Free. 510-525-7777, www.booksinc.net.


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Author Gareth Porter. Investigative reporter Gareth Porter discusses the findings of his new book "Manufactured Crisis: The Untold Story of the Iran Nuclear Scare," showing that many of the claims that western officials make about Iran having long pursued a nuclear weapons program are based on flimsy and in many cases clearly fabricated evidence. 7 p.m. April 4. Berkeley Fellowship of Unitarian Universalists, 1924 Cedar St. Suggestion donation $5-10. 510-841-4824, justworldbooks.com.

Jane Goodall: Seeds of Hope. Primatologist, ethologist and anthropologist Jane Goodall discusses her new book, "Seeds of Hope," answers questions, and signs books. Co-author Gail Hudson and host Claire Hope Cummings also appear. 7:30 to 9:30 p.m. April 4. Martin Luther King Jr. Middle School, 1781 Rose St. $15 advance. $18 door. 510-967-4495, www.brownpapertickets.com.

Rescue at Pine Ridge. Author and Filmmaker Erich Martin Hicks visits the Berkeley Public Library to discuss his novel "Rescue at Pine Ridge," a fictionalized account of the rescue of the 7th Cavalry by the Buffalo Soldiers of the 9th Cavalry. 2 to 4 p.m. April 5. Berkeley Public Library, 2090 Kittredge St. Free. 510-981-6278, www.berkeleypubliclibrary.org.

EcoHouse Drought Strategy. Get serious about water conservation with this in-depth slide show and presentation on water ecology and innovative water recycling solutions, including graywater systems, rainwater catchment, earthworks, and water-wise landscaping. Registration required. 10 a.m. April 6. EcoHouse, 1305 Hopkins St. $10 to $15. 510 548-2220 ext. 239, ecologycenter.org.

Gray Panthers Party. Berkeley-East Bay Gray Panthers' party and fundraiser features the movie "Cradle Will Rock," music, a silent auction and refreshments. 2:30 p.m. April 6. Berkeley Arts Festival, 2133 University Ave. 510-598-9696, www.berkeleygraypanthers.mysite.com.

Author Ayelet Waldman. UC Berkeley's Morrison Library's Story Hour in the Library features Ayelet Waldman's new novel, "Love and Treasure." 5 to 6 p.m. April 10. Morrison Library inside of Doe library, 101 Doe Library. Free www.storyhour.berkeley.edu.

Computers for Beginners. Learn how to use the mouse, use the keyboard, set up email and search the Internet at this free, drop-in class in a relaxed atmosphere. 10 to 11 a.m. Thursdays. Berkeley Public Library, 2090 Kittredge St. Free. 510-981-6148, www.berkeleypubliclibrary.org.