10 http://www.livescience.com/32467-why-do-men-have-nipples.html
9 http://healthyliving.azcentral.com/heart-beat-fast-exercise-1280.html
8 http://physics.stackexchange.com/questions/141128/how-does-water-help-extinguish-fire
7 http://www.smithsonianmag.com/science-nature/where-did-dragons-come-from-23969126/?no-ist
6 http://www.sciencemadesimple.com/space_black_sunset_red.html
5 http://www.almanac.com/content/origin-day-names
4 http://earthsky.org/space/milky-way-rotation
3 https://www.google.com.au/search?sourceid=chrome-psyapi2&rlz=1C1MSNA_enAU659AU659&ion=1&espv=2&ie=UTF-8&q=antonym%20of%20opposite&oq=antonym%20of%20opposite&aqs=chrome..69i57j0l5.3661j0j7
2 http://mentalfloss.com/article/21035/why-do-limbs-fall-asleep
1 http://www.space.com/11750-alien-planets-solar-systems-kepler-aas218.html