Cancer is the leading cause of death worldwide and it is a biologically complex set of diseases, so Sean and Nathan dive in to the biology this week (and next week) on Petri Dish. Cancer affects almost everyone in the world, with millions of people diagnosed each year and almost everyone knowing someone who has had cancer. This episode, they talk about what cancer is, what the main theories are on the cause of cancer, and the different kinds of cancer out there. Next week we discuss current and next-gen treatments for cancer and risk-factors for cancer! Tune in!Have questions? Want to yell at Sean or Nathan? Well, Nathan doesn't read the twitter, but Sean does! Tweet at him @dishpodcast, or email them at petridishpod -at- gmail.com. Check us out at patreon.com/petridish!References:https://www.nature.com/articles/s41551-019-0420-5https://www.pnas.org/content/116/9/3502https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0100937https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5501415/https://www.nature.com/articles/s41551-019-0423-2https://www.nature.com/articles/d41586-019-02892-y