A biomechanical analysis finds T. rex likely moved toe-first, similar to birds, enabling up to 20% faster speeds; a light 1.4-tonne T. rex could cover 100m in about 8.77 seconds, faster than Usain Bolt’s world record, with larger individuals still near 10.5 seconds.
Melissa Jefferson-Wooden set a personal best of 10.73 seconds in the 100m at Grand Slam Track Philadelphia, tying her for 10th on the all-time women's list and becoming the second-fastest American woman in history, fueling her ambition to become a world champion.
Sha'Carri Richardson of the United States won the women's 100m gold at the World Athletics Championships in Budapest, defeating Jamaica's Shelly-Ann Fraser-Pryce and Shericka Jackson. Richardson set a championship record time of 10.65 seconds despite starting in lane nine. This victory comes after Richardson was barred from the Tokyo Olympics and failed to qualify for the previous world championships. In other events, Grant Holloway of the US won his third consecutive world 110m hurdles title, while Sweden's Daniel Stahl claimed the men's discus gold and Hugues Fabrice Zango of Burkina Faso won the men's triple jump.