ATHLETICS
1No other sport offers more medals than athletics: 141.
2Race walking will begin and end at Pontal, the marathon will conclude at the Sambodromo and all other events will be held in Olympic Stadium, which has been modernized since it was built for the 2007 Pan Am Games.
3The U.S. leads all countries with 767 all-time medals, including 320 gold. Canada sits 16th with 53.
4The Dibabas are the only siblings to ever hold concurrent world records. Tirunesh, who won gold over 5,000m and 10,000m in Beijing, won gold in 10,000 and bronze in 5,000 in London. Genzebe is the world champion in the 1,500 race and won bronze over 5,000 metres at worlds.
5Canadian Melissa Bishop — who won silver in the 800-metre at the 2015 world championships — turned 28 on Aug. 5.