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Summary
The program was initiated in 1984 as a follow-on to Science Dawn. In contrast to Science Dawn, which stressed horizontal takeoff, Science Realm investigated vertical takeoff SSTO designs, capitalizing on the high thrust-to-weight ratio of a rocket engine. During the program structural test articles were designed based on Science Dawn designs. The cost of Science Dawn and Science Realm together was about $20 million.
Sources
http://www.secretprojects.co.uk/forum/index.php/topic,315.0/all.html