I ' ve Garmin forerunner 235 and it ' s pretty freaking good . Much better that the previous GPS watches I ' ve used in the past . The UI isn ' t the greatest , but I still like the functionality . <| sep |> Road races or triathlon speed ? always enjoy the view during a race very motivating <| sep |> Who plays motoball then , 10 yearolds ? <| sep |> The mass extinction of all females could be justified with an illness . It ' s a type of STD , is carried by men but without symptoms and is passed down to children . The symptoms are triggered by hormones when a female enters puperty . The illness leads to death . Or the desease works similar to cervical cancer . Since you mentioned your humans get 400 years old , a symptoms of the ilness could be to speed up the aging porocess . Aging in our world is caused by cells that don ' t regenerate fast enough to repair our body . For a faster extinction of females a possibility for the disease would be to change the DNA of those suffering from it , so no more females are born . Another option is a parasite that killed all females for personal gain like feeding off their ovuli or using them for reproduction . Or the parasite wants your species to go instinct to reclaim the country they live in for themselves . Like an apocalyptic movie in which the nature wants the earth back .