Space News Archive - April 29, 2012
Testing has begun on an engine that could make it possible for a plane to travel into space, travel at five times the speed of sound, and make it possible to reach any destination on the planet in no more than four hours.
Word of the Day
- An imitative word; an onomatopoetic word.
The word 'onomatope' is a back-formation from 'onomatopoeia'.