Misc: who showed us how to get through life's "passages"??

Questions

For what feat is Alexei Leonov famous?

Which French town is famous for Porcelain and less famous as H.Q. of the International Bureau of Weights and Measures?

Which famous poem features a hamlet called Auburn?

Pinchbeck is an alloy of copper and what else?

Who was the democratically elected President of Chile killed during a military coup in 1973?