To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S4. 3D printing of an artificial nest made of kaolinite clay and mucin solution using the Direct Ink Writing method. Avian mud nest architecture by self-secreted saliva Yeonsu Jung, Sohyun Jung, Sang-im Lee, Wonjung Kim, and Ho-Young Kim PNAS. 2021. 118:None-None DOI: 10.1073/pnas.2018509118 Download Original Video Browse All Videos »