Which happened earlier: Mars bar introduced or Bronx Zoo opens?

Question 1

Which happened earlier?

A Mars bar introduced

B Bronx Zoo opens ✓ Earlier

Bronx Zoo opens (8 November 1899) came before Mars bar introduced (1 January 1932)

Question 2

Which happened earlier?

A Cubism emerges

B Waitrose founded ✓ Earlier

Waitrose founded (1 January 1904) came before Cubism emerges (1 January 1907)

Question 3

Which happened earlier?

A Toyota Prius launched ✓ Earlier

B Kindle released

Toyota Prius launched (10 December 1997) came before Kindle released (19 November 2007)

Earlier #210