i'm the president of friends of mclaren park. it is one of the oldest neighborhood community park groups in san francisco. i give a lot of tours through the park. during those tours, a lot of the folks in the group will think of the park as very scary. it has a lot of hills, there's a lot of dense groves. once you get towards the center of the park you really lose your orientation. you are very much in a remote area. there are a lot of trees that shield your view from the urban setting. you would simply see different groves that gives you a sense of freedom, of being outdoors,

not being burdened by the worries of city life. john mclaren had said that golden gate park was too far away. he proposed that we have a park in the south end of the city. the campaign slogan was, people need this open space. one of the things that had to open is there were a lot of people who did a homestead here, about 25 different families. their property had to be bought up. so it took from 1928 to 1957 to buy up all the parcels of land that ended up in this 317 acres. the park, as a general rule, is heavily used in the mornings and the evenings. one of the favorite places is up by the upper reservoir because dogs get to go swim. it's extremely popular. many fights in the city, as you know, about dogs in parks. we have 317 acres and god knows there's plenty of room for both

of us. man and his best friend. early in the morning people before they go to work will walk their dogs or go on a jog themselves with their dogs. joggers love the park, there's 7 miles of hiking trails and there's off trail paths that hikers can take. all the recreational areas are heavily used on weekends. we have the group picnic area which should accommodate 200 people, tennis courts are full. it also has 3 playground areas. the ampitheater was built in 1972. it was the home of the first blues festival. given the fact that jerry garcia used to play in this park, he was from this neighborhood, everybody knows his reputation. we thought what a great thing it would be to have an

ampitheater named after jerry garcia. that is a name that has panache. it brings people from all over the bay area to the ampitheater. the calls that come in, we'd like to do a concert at the jerry garcia ampitheater and we do everything we can to accommodate them and help them because it gets people into the park. people like a lot of color and that's what they call a park. other people don't. you have to try to reconcile all those different points of view. what should a park look like and what should it have? should it be manicured, should it be nice little cobblestones around all of the paths and like that. the biggest objective of course is getting people into the park to appreciate open space. whatever that's going to take to make them happy, to get them there, that's the main goal. if it takes a planter with flowers and stuff like that, fine. you know, so what? people need to get away from

that urban rush and noise and this is a perfect place to do it. feedback is always amazement. they don't believe that it's in san francisco. we have visitors who will say, i never knew this was here and i'm a native san franciscoan. they wonder how long it's been here. when i tell them next year we'll get to celebrate the 80th anniversary of the park,

>> you probably think you know all about the exploratorium. but have you ever been after dark? did you know there was a monthly party called after dark? science mixes with culture and adults mix with other adults. no kids allowed. every week there is a different theme. to tell us about the themes is melissa alexander. tell us about some of the previous themes we have had. >> we have had sex ploration,

sugar, red, blue. many things. >> what is the theme tonight? >> rock, paper, scissors. we are having a tournament tonight, but we have also used as a jumping off point to explore lots of different ideas. you can find out about rock, paper, scissors as a game as a reproductive strategy. you can interact with a piece of art created by lucky dragon. you can get your hair cut from a cool place called the public barber's salon. they use scissors only. you can find out about local geology, too. >> that sounds like fun. let's check it out. >> this is the most common rock on the surface of the earth.

interesting thing is, most of this rock is covered over by the ocean. >> error congested a cool presentation on plate tectonics. tell us about what we just saw. >> we wrapped up a section of a lesson on a plate tectonics, here at the exploratory and -- exploritorium. >> are you excited to see people here having fun and learning about science? >> the people that come here are some selected to begin with, they actually enjoy science. i teach teachers to have fun with their kids. the general public is a great audience, too. they're interested in science. >> we have a blast every time. they have different names. >> they have a bar and a cafe.

everything i need. we are excited for the speaker. >> it is nice to be in the exploratorium when there are not a lot of kids around. >> before tonight, i never knew there were major league rules to rock, paper, scissors. i am getting ready to enter into a competition. sarah's here to give me some tips. what do i need to do to win it? >> this is a game of chance, to a degree. one of the best ways to bring it home is a degree of intimidation, maybe some eye contact, maybe some muscle. it is a no contact sport. sheer i contact is a good way to maybe intimidate to see if you can set them off, see if they throw something they did not mean to. >> i am going to see what happens. >> i got kicked out in the first round.

[applause] >> given up for sunni. the rock, paper, scissors champion. >> what are you going to do now? >> i have been having so much fun. i got my tattoo. before we go, i want to thank melissa alexander for having us here tonight. how did you know san francisco needed a night like tonight? >> thank you for coming. everybody loves the exploratorium. we are reluctant to push the kids out of the way in the day, so i knew we needed to create one evening a month just for the rest of us to have a good time, the adults. >> absolutely. where can we find out what is coming up after dark? >> that is easy, exploratorium

.edu/afterdark. >> thank you. thanks for watching