> The only permanent bipeds of the animal kingdom alongside humans
Kangaroos?
replies(3):
Kangaroos?
What has 4 legs in the morning, 2 in the afternoon, and 3 in the evening?
The key here is how relaxed is the interpretation of "permanent".
To answer the question: a yacht race?
(Aside from AI Yacht's, of course: https://www.youtube.com/watch?v=U79-kDQnbPE )
Now, nobody is completing that race in one day, but that’s a different issue.