https://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/3/1009/files/2015/05/Bottle-Ecosystem-Lab-Tim-Downs1.pdf
https://blogs.cornell.edu/cibt/labs-activities/labs/bottle-ecosystem-lab-tim-downs-3/
https://www.kew.org/kew-gardens/whats-in-the-gardens/carnivorous-plants