i want to invite, now, dennis bartel and our explainers up to place the final piece on top of the bell. as rob said, sorry, you were bitter as well and we have one more piece to go but i would like to invite all of the speakers on stage if you could please, and while they are coming up here, i wanted to also thank all of you, in particular, i know of a few of our pier colleague institutions from around the world from as far away as finland, and australia, costa rica and france have joined us here today and to all of our friends who come to share this moment with us, thank you so much. >> so, it is my honor to introduce the final piece through the future. our future. represented in our high school explainer gloria granatos, >> so this final piece represents our friends, our communities our visitors, teachers, students and users worldwide. [ applause ] [ applause ] [ cheers ] and our artists makia. i believe that means, that the exporatorium is now open, please come inside. thank you, everybody. thank you. ♪ so are you going out tonight? i can't. my parents say i have to be home right af