References:

10. What would happen to the world if all humans disappeared?

https://ed.ted.com/lessons/what-would-happen-if-every-human-suddenly-disappeared-dan-kwartler

https://www.marketwatch.com/story/10-things-that-would-happen-to-the-planet-if-humans-were-to-completely-disappear-2016-06-06

9. Why are some people right handed and others left handed?

https://www.smithsonianmag.com/science-nature/why-are-some-people-left-handed-6556937/

https://www.rd.com/culture/why-people-left-handed/

8. Could a non-carbon based lifeform ever exist?
http://teacherlink.ed.usu.edu/tlnasa/reference/imaginedvd/files/imagine/docs/ask_astro/answers/980221b.html

https://www.geek.com/news/geek-answers-why-is-all-life-carbon-based-1572567/

7. Garbage bin
https://www.wikihow.com/Throw-Away-a-Trash-Can
https://www.reddit.com/r/funny/comments/1jqirf/its_harder_than_it_looks_to_throw_away_a_trash_can/
https://www.ehow.com/how_2278464_throw-away-trash-can.html

6. What would happen to humans if dinosaurs still existed?
https://earthlyuniverse.com/dinosaurs-todays-environment/
https://www.sciencefocus.com/nature/could-a-dinosaur-survive-in-todays-climate-conditions/

5. Why is blue the color for boys and pink the color for girls?
https://colorpsychologymeaning.com/why-is-pink-for-girls-blue-for-boys/
https://www.livescience.com/27248-chromosomes.html

4. How do worms reproduce?
https://sciencing.com/how-do-earthworms-reproduce-13406886.html
https://animals.howstuffworks.com/animal-facts/earthworm3.htm


3. Who invented the alphabet?
http://www.todayifoundout.com/index.php/2013/09/the-origin-of-the-english-alphabet/
https://wonderopolis.org/wonder/who-invented-the-alphabet

2. Where did the idea of cats having nine lives come from?
http://www.unexplainedstuff.com/Superstitions-Strange-Customs-Taboos-and-Urban-Legends/Superstitions-Cats.html
https://www.mirror.co.uk/news/ampp3d/cats-9-lives-facts-behind-4388389

1. How did the “medicine” ball get its name?
http://www.todayifoundout.com/index.php/2015/04/called-medicine-ball-just-heavy-ball/
https://www.sportsrec.com/160928-why-is-it-called-a-medicine-ball.html
https://babel.hathitrust.org/cgi/pt?id=coo.31924071607323;view=1up;seq=181