The benefits of a good night’s rest are well known. Less understood by scientists is precisely why we feel tired. New research may have found the source of our fatigue.  
 
Elsewhere, interest in women’s sport is booming. The extra attention has brought big money: revenue from women’s professional sports is forecast to reach $2.4bn in 2025, up from $692m in 2022. We argue that female athletes should use this welcome development to break free of the federations and leagues that govern their male counterparts. 

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