Misc: On This Day In January 1957 - "Collier?

Questions

when was the term middle age (medium aevum) first used?

who was late 5th century ad, anglo-saxon ruler who is credited with the foundation of the kingdom of the south saxons, or sussex?

what is the second largest continent in the world?

who won the 100-metre dash at the 1924 olympic games in paris?

by the turn of the century, acrobatics were important into the what?