10 – Green trees - https://askabiologist.asu.edu/chlorophyll-and-chloroplasts
9 – Lava - http://volcano.oregonstate.edu/what-lava-made , https://en.wikipedia.org/wiki/Magma
8 – Eat metal - http://wonderopolis.org/wonder/how-powerful-is-stomach-acid/ , http://www.atsdr.cdc.gov/PHS/PHS.asp?id=204&tid=37#bookmark05
7 – Brain storage - http://www.scientificamerican.com/article/what-is-the-memory-capacity/ , http://www.independent.co.uk/voices/editorials/the-human-brain-is-the-most-complex-structure-in-the-universe-let-s-do-all-we-can-to-unravel-its-9233125.html
6 – First cartoon - https://en.wikipedia.org/wiki/Animated_cartoon , https://en.wikipedia.org/wiki/Pauvre_Pierrot , https://en.wikipedia.org/wiki/Fantasmagorie_(1908_film)
5 – Why allergies - http://www.scientificamerican.com/article/dear-evolution-thanks-for/
4 – Optical illusions - http://www.optics4kids.org/home/content/illusions/
3 – Crop circles - http://www.colinandrews.net/Catalogue01.html (more designs on page two, link at the bottom-right)
2 – Money history - https://en.wikipedia.org/wiki/History_of_money#Emergence_of_money
1 – History true or not - http://www.usu.edu/markdamen/1320hist&civ/chapters/01hist.htm , http://historum.com/general-history/588-history-really-accurate.html