LINEAR survey of MIT's Lincoln Laboratories.
Ian reported
Venus Express
Hiroshima-sized atom bombs.
The Scale and Frequency Guide to Earth impacting Space Debris
Microscopic objects
Pebble to baseball sized objects
Dining room table sized objects
Large building sized objects:
Tunguska, Siberia fireball of 1908
Football-field sized objects
Small town sized objects:
City-sized objects
dinosaur-killer
Large state-sized asteroids
“2012” soothsayers
Photo Courtesy: Howard Edin