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.
Credit: NASA. Since the 1960s, spaceflight missions have resulted in the accidental deaths of more than 20 astronauts. The most recent disaster, occurring near the end of the space shuttle Columbia's STS-107 mission in 2003, caused NASA to ground its shuttle program for more than two years.