What are the decomposers in the underwater ecosystem? A: The decomposers in an underwater ecosystem are animal-like organisms called protists, fungi and bacteria. Referred to as saprotrophs, these organisms decom... Full Answer >
On 1 February 2003 the space shuttle Columbia exploded as it was attempting re-entry after a 16-day mission. All seven astronauts on board, including the first Israeli in space, were killed. Tributes to the astronauts were led by US President George W Bush.
Challenger's explosion changed the space shuttle program in several ways. Plans to fly other civilians in space (such as journalists) were shelved for 22 years, until Barbara Morgan, who was McAuliffe's backup, flew aboard Endeavour in 2007. Satellite launches were shifted from the shuttle to reusable rockets.