Articles with plans can be found by searching the Avery Index or the Architectural Index using the search terms aquarium and science museum or the name of the building. To get to these indexes go to the library website>resource by subject>art,architecture, & design>architecture and you will see a link to the Avery Index and the Architecture Index. You also could try Art Full Text.
For a list of building names for aquariums you could look at the Almanac for Architecture and Design, published by Design Intelligence, REF 720.A46. For a list of Science Museums you might search the American Association of Museums directory on the web. Another strategy is to browse the circulating books, under the call number for museums, 726.6. Lastly, two reference books, GA Contemporary Architecture (Museum 01_, call number REF 727.7.M87 2001 and the Phaidon Atlas of Contemporary World Architecture (large volume, on map table) REF 724.7.P43 2004 may provide a selection for you to consider further research.
Contact a librarian if you require further assistance. I'm adding some quick links below this answer for you.