We're cracking open the mailbag once again to answer some dusty old questions you sent us a long time ago! 

Ew, they're all rotten and goopy... well, we'll answer them anyway, because we care.

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: Ceri: @ceriley Sam: @slamschultz Hank: @hankgreen

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

Peat bogs

https://www.sciencedirect.com/topics/earth-and-planetary-sciences/peatland

https://www.britannica.com/technology/peat

https://www.smithsonianmag.com/science-nature/europe-bog-bodies-reveal-secrets-180962770/

https://www.sciencedirect.com/science/article/abs/pii/S0305440320300881?dgcid=rss_sd_all

https://www.culture24.org.uk/places-to-go/south-west/bristol/art20488

Spiders

https://www.livescience.com/24054-why-spiders-have-eight-eyes.html

https://www.nationalgeographic.com/news/2011/6/110603-spiders-spare-legs-webs-science-animals/

Laser eye surgery

https://www.npr.org/templates/story/story.php?storyId=6249164

https://pubmed.ncbi.nlm.nih.gov/22496438/

https://www.aao.org/munnerlyn-laser-surgery-center/laser-in-situ-keratomileusis-lasik-3

https://my.clevelandclinic.org/health/diseases/8586-corneal-disease

https://healthcare.utah.edu/the-scope/shows.php?shows=0_yrklfds0

Disease eradication

https://asm.org/Articles/2020/March/Disease-Eradication-What-Does-It-Take-to-Wipe-out

https://www.cdc.gov/smallpox/index.html

https://www.oie.int/en/for-the-media/press-releases/detail/article/eradication-isnt-the-end-of-the-rinderpest-story/#

Miner's egg

https://journals.sagepub.com/doi/pdf/10.1177/003591572201501935