What was the Air Force's first swept-wing fighter? *

Mikoyan Gurevich MiG-15

F-86 Sabre

Grumman F9F Panther

Douglas AD/A-1 Skyraider

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

building the panama canal

after the success of the sputnik launch in 1957, the us feared that they would not be able to send satellites to space.

their earlier attempts of building and sending a spacecraft failed miserably, and the soviets successfully did it. it gave rise to the era of cold war.