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.
The Fallen Heroes of Human Spaceflight. 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. Here, a list of the men and women who have lost their lives during spaceflight.