[1] NASA | NASA InSight's 『Mole' Ends Its Journey on Mars
https://www.nasa.gov/feature/jpl/nasa-insight-s-mole-ends-its-journey-on-mars
[2] Golombek, M., Warner, N. H., Grant, J. A., Hauber, E., Ansan, V., Weitz, C. M., ... & Banerdt, W. B. (2020). Geology of the InSight landing site on Mars. Nature Communications, 11(1), 1-11.
[3] DLR | The InSight mission logbook (February 2019 - July 2020)
https://www.dlr.de/blogs/en/all-blog-posts/The-InSight-mission-logbook.aspx
[4] Spohn, T., Grott, M., Smrekar, S. E., Knollenberg, J., Hudson, T. L., Krause, C., ... & Banerdt, W. B. (2018). The heat flow and physical properties package (HP3) for the InSight mission. Space Science Reviews, 214(5), 96.
[5] Marshall, J. P., Hudson, T. L., & Andrade, J. E. (2017). Experimental Investigation of InSight HP3 Mole Interaction with Martian Regolith Simulant. Space Science Reviews, 211(1-4), 239-258.
[6] https://twitter.com/kmcannon/status/1350213369765179400
[7] Wippermann, T., Hudson, T. L., Spohn, T., Witte, L., Scharringhausen, M., Tsakyridis, G., ... & Lichtenheldt, R. (2020). Penetration and performance testing of the HP³ Mole for the InSight Mars mission. Planetary and Space Science, 181,104780.
[8] TPS | Cost of Mars InSight
https://www.planetary.org/space-policy/cost-of-mars-insight
[9] NASA | NASA Extends Exploration for Two Planetary Science Missions
https://mars.nasa.gov/news/8829/nasa-extends-exploration-for-two-planetary-science-missions/
[10] NASA | InSight News
https://mars.nasa.gov/insight/news-and-events/news/?page=0&per_page=40&order=publish_date+desc%2Ccreated_at+desc&search=&category=183%3A19%2C165%2C184%2C204&blank_scope=Latest&url_suffix=%3Fsite%3Dinsight
https://www.nasa.gov/mission_pages/insight/main/index.html