This Arbor Day, give your favorite tree the gift they really want: this tree-themed episode of SciShow Tangents. Just put the headphones around its trunk or in a knothole! 

Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! 

While you're at it, check out the Tangents crew on Twitter: Stefan: @itsmestefanchin Ceri: @ceriley Sam: @slamschultz Hank: @hankgreen

If you want to learn more about any of our main topics, check out these links!

[Truth or Fail]

Dragon’s Blood Tree

https://www.nationalgeographic.com/environment/2018/11/socotra-yemen-biodiversity-photography/

Dynamite Tree

https://youtu.be/lNlk2V9yFhM

https://rare.us/rare-news/science-and-nature/sandbox-tree-hura-crepitans/

Coconut Fatalities

https://en.wikipedia.org/wiki/Death_by_coconut

[Fact Off]

Vampire stump

https://www.cell.com/iscience/fulltext/S2589-0042(19)30146-4
https://www.eurekalert.org/pub_releases/2019-07/cp-ats071819.php
https://www.livescience.com/66025-kauri-tree-superorganism-root-grafting.html
https://www.nytimes.com/2019/07/25/science/tree-stump-alive.html

Ghost redwoods

https://www.mercurynews.com/2010/11/28/albino-redwoods-hold-scientific-mystery/

https://sempervirens.org/discover-redwoods/ghost-redwoods-solving-the-albino-redwoods-mystery/

https://ucanr.edu/sites/Redwood2016/files/250645.pdf

https://ucanr.edu/sites/Redwood2016/files/243400.pdf

[Ask the Science Couch]

Tree definition

https://www.americanforests.org/wp-content/uploads/2014/12/AF-Tree-Measuring-Guidelines_LR.pdf

Willows

https://oregonstate.edu/trees/broadleaf_genera/willow.html

https://www.thoughtco.com/worlds-smallest-tree-species-1343503

Bonsai / Pygmy Forests

https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/426/426-601/426-601_pdf.pdf

Other trees

https://extension.uga.edu/publications/detail.html?number=C944&title=Crape%20Myrtle%20Culture

http://www.pnwplants.wsu.edu/PlantDisplay.aspx?PlantID=169

[Butt One More Thing]

Butt rot

https://hortnews.extension.iastate.edu/2007/7-11/root_butt_rot.html

https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5347109.pdf