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.
NASA managers green-lighted the launch. The O-rings starting failing immediately as The Challenger was lifting off, causing this plume of grey smoke : At 58 seconds, flaming gas is seen escaping the right SRB : At 73 seconds, the liquid hydrogen tank was breached and the shuttle exploded.