Igneous, sedimentary, metamorphic... need I say more? Welcome to SciShow Tangents or, as I like to call it, Rock Talk.
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[Trivia Question]
Stonehenge sarsen vs. Dwayne “The Rock” Johnson
https://www.livescience.com/22427-stonehenge-facts.html
[Fact Off]
Microgranite used for curling stones
http://nora.nerc.ac.uk/id/eprint/505002/
https://earthobservatory.nasa.gov/images/91856/ailsa-craig
https://olympics.com/en/news/the-remarkable-properties-and-origins-of-the-olympic-curling-stone
https://www.sciencefriday.com/articles/getting-to-the-core-of-olympic-curling-stones/
https://www.sciencedirect.com/science/article/abs/pii/S0043164813000732
Solitary bees drilling into sandstone
https://eos.org/articles/rock-chomping-bees-burrow-into-sandstone
https://www.earthmagazine.org/article/busy-bee-new-species-bee-quarries-sandstone/
https://www.cell.com/current-biology/comments/S0960-9822(16)30902-2
[Ask the Science Couch]
Licking rocks or bone
https://www.discovery.com/science/Difference-Between-Rock-Fossil
https://www.clemson.edu/public/geomuseum/specimen_id/id_tool.html
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018WR023233
https://www.sciencedirect.com/topics/earth-and-planetary-sciences/wettability
https://twitter.com/mikamckinnon/status/1030188006966214660?s=20&t=_yJPJKVlGOpjTIMLy4y4mg
https://voices.pomona.edu/2013/11/on-the-merits-of-licking-rocks/
https://www.scientificamerican.com/article/stick-with-it-put-your-duct-tape-to-the-test/
[Butt One More Thing]
Limestone-eating and sand-pooping shipworm
https://www.discovermagazine.com/planet-earth/incredible-rock-eating-shipworm-is-first-of-its-kind