Two World Records in 40 Minutes: How Alison dos Santos and Masai Russell Rewrote Hurdling in Zurich
Alison dos Santos broke one of athletics’ most celebrated records with 45.80 in the 400m hurdles. Thirty-seven minutes later, Masai Russell ran 12.09 with zero wind to break the women’s 100m hurdles world record. The numbers reveal how differently — and brilliantly — the two records were constructed.