The number one most watched summer Olympics sport is soccer. The second most watched sport is men's and women's swimming.
There is no 50 km swimming event.
The longest swimming event for men in the Olympics is the 1500 meter freestyle and for women is the 800 meter freestyle.
No, swimming was first introduced in 1896 for men in Athens, Greece. Women's swimming was introduced in 1912 at the games in Stockholm, Sweden.
There are 17 Men'a events and 17 Women's events for Swimming
Ian Thorpe of Australia won the gold medal for men's 200m freestyle swimming in 2004 olympics.
It began for men in the modern Olympics in 1896, and for women in 1912.
Brent HaydenCanada (CAN)
Park Taehwan (Korea) won the gold medal in the men's 400 meter freestyle swimming in the 2008 Summer Olympics.