References

10 - What would happen if the Sun had a moon?

https://www.windows2universe.org/our_solar_system/moons_table.html

https://en.wikipedia.org/wiki/Natural_satellite

https://www.quora.com/Does-the-sun-have-a-moon-Why-or-why-not

9 - How would Earth be different if it had rings like Saturn?

https://www.cnet.com/news/if-earth-had-rings-like-saturn-the-sky-would-look-like-this/

http://mentalfloss.com/article/73739/why-doesnt-earth-have-rings

https://en.wikipedia.org/wiki/Giant-impact_hypothesis

https://en.wikipedia.org/wiki/Theia_(planet)


8 - What will the night sky look like when our galaxy collides with Andromeda?

http://earthsky.org/space/video-of-earths-night-sky-between-now-and-7-billion-years

https://en.wikipedia.org/wiki/Elliptical_galaxy

https://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html

7 - If the Earth was hollow, how long would it take for one person to fall from one side to the other?

http://hyperphysics.phy-astr.gsu.edu/hbase/Mechanics/earthole.html

http://www.iflscience.com/physics/faster-journey-center-earth/

6 - If we can heal cuts and bruises, why can’t humans re-grow missing limbs?

https://www.reddit.com/r/askscience/comments/178cep/why_dont_humans_regenerate_limbs/

https://medlineplus.gov/ency/patientinstructions/000741.htm

https://www.cirm.ca.gov/patients/stem-cell-key-terms

https://www.reddit.com/r/explainlikeimfive/comments/6f2gtb/eli5_why_cant_humans_regrow_limbs/

https://stemcells.nih.gov/info/basics/4.htm

5 - Which animals have the longest and shortest memories on the planet?

https://news.nationalgeographic.com/news/2013/08/130806-dolphins-memories-animals-science-longest/

https://news.nationalgeographic.com/2015/02/150225-dogs-memories-animals-chimpanzees-science-mind-psychology/

4 - Where did the tradition of carving Jack O'Lanterns come from?

http://foodanddrink.scotsman.com/food/halloween-pumpkin-carving-and-its-origins-in-scottish-traditions/

https://en.wikipedia.org/wiki/Jack-o%27-lantern

http://www.history.com/topics/halloween/jack-olantern-history

3 - If humans hunted the Wooly Mammoth to extinction how did the Elephant survive?
http://www.nationalgeographic.com.au/history/why-did-the-woolly-mammoth-die-out.aspx

http://www.elephant-world.com/elephant-evolution/

2 - Is there any chance that humans may evolve wings in the future?

https://www.quora.com/Under-what-circumstances-would-humans-develop-wings-in-an-evolutionary-process

https://www.quora.com/Why-havent-humans-evolved-to-grow-wings-yet

1 - What is the most unsolved mystery in the universe?

https://www.smithsonianmag.com/science-nature/top-ten-mysteries-of-the-universe-83272912/

https://www.livescience.com/34052-unsolved-mysteries-physics.html