References
10 – Fastest car - https://en.wikipedia.org/wiki/List_of_fastest_production_cars_by_acceleration
https://en.wikipedia.org/wiki/Production_car_speed_record
http://www.businessinsider.com/the-worlds-fastest-production-cars-2016-3/?r=AU&IR=T
http://www.odometer.com/o/10-fastest-street-legal-cars
http://www.autoexpress.co.uk/best-cars/89044/the-worlds-fastest-road-cars-2017
9 – more moons - https://worldbuilding.stackexchange.com/questions/71/how-would-having-multiple-moons-affect-tides
https://www.universetoday.com/92148/what-if-the-earth-had-two-moons/
http://curious.astro.cornell.edu/about-us/37-our-solar-system/the-moon/the-moon-and-the-earth/38-what-would-happen-if-earth-had-more-than-one-moon-intermediate
8 – Puberty - https://www.reddit.com/r/askscience/comments/412b2k/can_someone_go_through_early_life_and_puberty_in/
https://answers.yahoo.com/question/index?qid=20090303170927AA9oEzM
https://theboard.byu.edu/questions/64812/
 
7 – Eye colour - https://en.wikipedia.org/wiki/Eye_color#Changes_in_eye_color
https://www.quora.com/Can-sound-frequencies-change-your-eye-color
https://www.quora.com/Can-ultrasound-frequencies-change-eye-colour
http://www.theage.com.au/national/education/voice/can-your-eye-colour-change-20141009-3hlg3.html
6 – Ouija board - https://en.wikipedia.org/wiki/Ouija#Talking_boards
http://www.smithsonianmag.com/history/the-strange-and-mysterious-history-of-the-ouija-board-5860627/
http://time.com/4529861/ouija-board-history-origin-of-evil/
http://mentalfloss.com/article/12952/brief-history-ouija-board
5 -  Sand - https://en.wiktionary.org/wiki/sand#Old_English
https://www.merriam-webster.com/dictionary/sand
http://etymonline.com/index.php?term=sand&allowed_in_frame=1
http://www.dictionary.com/browse/sand
4 – Longest word - https://en.wikipedia.org/wiki/Longest_word_in_English
https://www.grammarly.com/blog/14-of-the-longest-words-in-english/
https://en.oxforddictionaries.com/explore/what-is-the-longest-english-word
3 – Tails - https://www.reference.com/science/animals-tails-21f11daba5426188
https://www.washingtonpost.com/lifestyle/kidspost/ever-wonder-why-animals-have-tails/2012/10/12/23c17198-b3d9-11e1-98e9-bbf4aa4074bb_story.html?utm_term=.ccc51dd2ef6d
https://en.wikipedia.org/wiki/Tail#Function
http://scienceline.ucsb.edu/getkey.php?key=3120
2 – Curly or Straight - http://mentalfloss.com/article/67066/what-makes-curly-hair-curly
http://www.livescience.com/32104-what-makes-hair-curly.html
https://helix.northwestern.edu/blog/2014/05/science-curls
http://time.com/7593/curly-hair-physics-explained/
1 – sun - https://www.businessinsider.com.au/what-would-happen-if-the-sun-disappeared-2015-8?r=US&IR=T
https://curiosity.com/topics/what-would-happen-if-the-sun-disappeared-curiosity/
http://earthsky.org/space/what-would-happen-if-sun-disappeared-infographic
https://www.spaceanswers.com/solar-system/can-you-fly-through-the-asteroid-belt-unharmed/