Today, cities across the world -- including Moscow, Tokyo, London, Houston, even a South Pole science station -- are celebrating the anniversary.
Crews conduct a variety of science experiments and perform station maintenance during their six-month stay on the outpost.
Half a billion dollars meant for science experiments on board the station have already been siphoned off for construction instead.
However, he did add that at least some of the return could take the form of equipment procured for use on the space station's European science laboratory, Columbus.
BBC: Europe and US agree details for Orion astronaut spacecraft
Richard Schofield from Network Rail said plans for a station at the Cambridge Science Park was a definite scheme by the site's developer and would be implemented in the next two to three years.
BBC: Hopes for new stations but campaign wants faster trains
From a research station operated by the National Science Foundation called Summit Camp, a spot where the ice sheet is about 2 miles thick, GROVER will crawl at an average speed of 1.2 mph (2 kilometers per hour).
ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)
For a country that put a man on the moon and ran a taxi service to the International Space Station, this is not rocket science!
Getting people on and off the space station is not, actually, rocket science any more.
The Mars Science Laboratory spacecraft launched from Cape Canaveral Air Force Station in Florida on November 26, 2011.
Alien superbugs and space spiders are the subjects of two student-designed science experiments due to launch toward the International Space Station today (July 20) aboard a robotic Japanese spacecraft.
The release marks the latest chapter in a story that has run for several years, with critics of climate science trying to force institutions to release raw weather station data rather than figures that have been processed and analysed.
Within hours, NASA will retrieve the science samples meticulously collected over the weeks and months by space station astronauts, as well as experiments that flew up with Dragon, such as flowering weeds and mouse stem cells.
For example, if Station experiences delays, the Shuttle does not fly, science payloads are on-hold, and some operations are deferred.
WHITEHOUSE: Jacob J. Lew Testimony to House Science Committee, 08/06/1998 | The White House
And a long duration living and working in space is what the Space Station is all about -- to do the research and the science necessary to take us beyond Earth orbit.
WHITEHOUSE: President Obama's call to the International Space Station
The primary difference between the terrestrial-based instruments and AMS is that AMS' science instrument systems were miniaturized and ruggedized for launch on the space shuttle and operation on the space station.
ENGADGET: AMS detects excess of positrons, could suggest existence of dark matter
The concept of an international space station had just been announced in 1993, and Ting and his collaborators saw an opportunity for groundbreaking science in space.
ENGADGET: AMS detects excess of positrons, could suggest existence of dark matter
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