The Encyclopedia Astronautica is a reference web site on space travel. A comprehensive catalog of vehicles, technology, astronauts, and flights, it includes information from most countries that have had an active rocket research program, from Robert Goddard to the NASASpace shuttle to the Soviet shuttle Buran.
It is maintained by space enthusiast Mark Wade, who has been collecting such information for most of his life.
... sexes, to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
The external urethral sphincter is the skeletal muscle that ...