The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Korean Okhwan Yoon left behind a profitable business to cycle the world in aid of world peace. For over 9 years, he has biked across 192 countries on six continents, and has survived 6 car accidents, malaria, extreme temperatures, robbery, and kidnapping.
16
A woman named Rachel Krishevsky who died at age 99 had 1,400 direct descendants.
17
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12