science festival 2021 Q62 ja
![空ってなんで青いの?](/sites/default/files/styles/embed_lg_1x/public/2023-12/science_festival_2021_Q62_ja.jpg?itok=C_hP4tr6)
Date:
11 December 2023
Copyright OIST (Okinawa Institute of Science and Technology Graduate University, 沖縄科学技術大学院大学). Creative Commons Attribution 4.0 International License (CC BY 4.0).