1) The first modern Olympic marathon race was held at the 1896 Olympics in Athens and has since become one of the most iconic and challenging events in athletics.

2) The world's largest particle accelerator, the Large Hadron Collider, is located near Geneva, Switzerland, and spans a circumference of 17 miles (27 kilometers).

3) Sloths only poop once a week, and when they do, they lose about one-third of their body weight.

4) The FIFA Women's World Cup has been held since 1991 and showcases the best women's national soccer teams from around the globe.