Misc: In 1758 Wilhelm Olbers, discoverer of asteroids ---------- and Vesta, born. ?

Questions

Why did 2 and a half million dutchmen have to walk home in 1982?

What do the initials IMF stand for?

What is close to Londons Isle of Dogs which leads it to have street names such as Cuba Street,Tobago Street etc?

Who reached the summit of Everest with Hillary in 1953?

What reduction is indicated when a measurement is prefixd by the word pico?