1- Black Pentagon White Hexagon Football Ball Design
Most known football ball which is black pentagon and white hexagon was inspired by Telstar Communication Satellite which was launched in 1962 by NASA.

2- Whistle instead of Handkerchief
Referees have overseen games with a Handkerchief until 1878. First whistle was used in this year.

3- Goal Post Was Unlimited From Above
There were no upper limit for Goal Posts, If the ball passed between 2 goal posts it was accepted as goal, it didn't matter how high was the ball.

4- Red and Yellow Cards Are Quite New
Until 1970 Referees were dismissing players verbally. There was a confusion in the game of England - Argentina quarter final 1966 World Cup Game. Referee couldn't make the call whom was dissmissed from game. According to this incident English Referee Ken Aston offered Red and Yellow Cards which idea was taken from traffic lights. This idea accepted and applied in 1970 World Cup. No one got Red Card in this cup. In 1974 World Cup Chilean Carlos Caszely was the first player got a Red Card.

5- First Football Like Sport was played in China
Despite modern football has started in England, Primitive versions of football were played in China before 2200 years. In the Middle Ages; kicking opponent, punching and biting was allowed.

image source: cuju

6- Most Attendance on a Game: 199.854
1960 World Cup Final between Uruguay and Brazil had almost 200 thousands people in Maracana Stadium. This record can't be broken yet.

7- First Women's World Cup
First Women's World Cup played in China in 1991 and USA won the cup.

8- Smallest Country on World Cup
Iceland
is the smallest country that achieved to join a World Cup. We all remember Iceland's success this year in 2018 world Cup. Iceland's population is just 340 thousands.

9- Most Red Cards in a Game
There were 20 Red Cards in Sportivo Ameliano and General Caballero game in Paraguay League. Also this game get into Guinness World Records Book. In 1 June 1993, 2 Sportivo Ameliano players got red cards, after this decision a fight started and lasted 10 minutes. After the fight Referee dismissed 18 more players.

10- Own Red Card by a Referee
English Referee Martin Sylvester
showed Red Card himself for punching a footballer.

11- Referee got arrested during a game
In 1978 Tanzanian referee was arrested during the game, because he used Marijuana in locker room.

12- Liberia in 1996 Africa Cup
Liberia National Team didn't have money for jerseys and transportation. Famous Liberian footballer George Weah paid all the expenses from his pocket and got team to the tournament.

13- World Cup is 5.9 Kilograms of 18 carat gold.

14- India in 1950 World Cup
Indian footballers weren't allowed to play bare foot. So they didn't attend to world cup in 1950.

15- The Arsenal
Arsenal team's name was originally "The Arsenal". They've changed it to be in the first line when listed alphabetically.

16- Transfer Fee: Meat.
In 1998 Romanian 2nd league team Jiul Petrosani's middlefielder Ion Rado transferred into Valcea for 500 kilograms of meat.

17- Long Lasted Game: Lincoln City - Coventry City
1962/1963 season game Lincoln City - Coventry City has started in 5 January 1963. Due to heavy snowing game delayed. At the next days game has started 15 more time and delayed again. 66 days later long lasted game has finished and Coventry city won the game with 6-1 score.

18- Ashley Ward: In just 5 minutes...
In November 1998 Ashley Ward scoread a goal, missed a penalty and has seen a red card in just minute against Sunderland.

19- Finland's Legend Pentti
Finland's Legend footballer Pentti scored 5 own goals in 1986.

20- Protesting previous game with own goals.
In the year of 2002; Madagascar team Stade Olympique L'Emryne scored 149 own goals against the champion AS Adema game. This was done because they protested the previous game's referee's jurisdictions.

So what are thougts? Do you have anything to add? I can edit and add them...

Source: translated from onedio.